SC TO-C

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE TO

TENDER OFFER STATEMENT UNDER SECTION 14(D)(1) OR 13(E)(1)

OF THE SECURITIES EXCHANGE ACT OF 1934

AMCOL International Corporation

(Name of Subject Company (Issuer))

Imerys Minerals Delaware, Inc.

a wholly owned subsidiary of

Imerys SA

(Names of Filing Persons (Offerors))

COMMON STOCK, PAR VALUE $0.01 PER SHARE

(Title of Class Of Securities)

02341W103

(CUSIP Number of Class of Securities)

Denis Musson

Vice-President, General Counsel & Company Secretary

Imerys SA

154 rue de l’Université

75007 Paris, France

+ 33 (0) 1 49 55 63 00

(Name, address, and telephone numbers of person authorized to receive notices and communications on behalf of filing persons)

With copies to:

Kenneth M. Wolff

Skadden, Arps, Slate, Meagher & Flom LLP

Four Times Square

New York, NY 10036

(212) 735-3000

CALCULATION OF FILING FEE

Transaction Valuation	Amount Of Filing Fee
Not Applicable*	Not Applicable*

* A filing fee is not required in connection with this filing as it relates solely to preliminary communication made before the commencement of a tender offer.

¨  Check the box if any part of the fee is offset as provided by Rule 0-11(a)(2) and identify the filing with which the offsetting fee was previously paid. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.

Amount Previously Paid: N/A	Filing Party: N/A
Form or Registration No.: N/A	Date Filed: N/A

x  Check the box if the filing relates solely to preliminary communications made before the commencement of a tender offer.

Check the appropriate boxes below to designate any transactions to which the statement relates:

x  third-party tender offer subject to Rule 14d-1.

¨  issuer tender offer subject to Rule 13e-4.

¨  going-private transaction subject to Rule 13e-3.

¨  amendment to Schedule 13D under Rule 13d-2.

Check the following box if the filing is a final amendment reporting the results of the tender offer:  ¨

If applicable, check the appropriate box(es) below to designate the appropriate rule provision(s) relied upon:

¨  Rule 13e-4(i) (Cross-Border Issuer Tender Offer)

¨  Rule 14d-1(d) (Cross-Border Third-Party Tender Offer)

This Tender Offer Statement on Schedule TO (this “Statement”) relates solely to preliminary communications made before the commencement of a planned tender offer by Imerys Minerals Delaware, Inc., a Delaware corporation (“Purchaser”), an indirect wholly-owned subsidiary of Imerys SA, a corporation organized under the laws of France (“Parent”), for all of the outstanding common stock of AMCOL International Corporation, a Delaware corporation (the “Company”), to be commenced pursuant to the Agreement and Plan of Merger, dated as of February 11, 2014, by and among Parent, Purchaser and the Company.

The tender offer for the outstanding shares of the Company’s common stock described in this filing has not commenced, and the exhibits hereto are neither an offer to purchase nor a solicitation of an offer to sell shares of the Company. This filing and the exhibits thereto is not a substitute for the tender offer materials that Parent and Purchaser will file with the U.S. Securities and Exchange Commission (the “SEC”) upon commencement of the tender offer. At the time the tender offer is commenced, Parent and Purchaser will file a Tender Offer Statement on Schedule TO, containing an offer to purchase, a form of letter of transmittal and other offer related tender offer documents with the SEC, and the Company will file a Solicitation/Recommendation Statement on Schedule 14D-9 relating to the tender offer with the SEC. Purchaser and the Company intend to mail these documents to the stockholders of the Company. These tender offer materials, as they may be amended from time to time, will contain important information about the tender offer and the stockholders of the Company and other investors are urged to read them carefully and in their entirety when they become available prior to making any decisions with respect to the tender offer. Stockholders of the Company will be able to obtain a free copy of these tender offer materials, when they become available, at the website maintained by the SEC at www.sec.gov. The Solicitation/Recommendation Statement and the other documents filed by the Company with the SEC will be made available to all stockholders of the Company free of charge at www.amcol.com.

2

EXHIBIT INDEX

(a)(5)(B)	Communication published by Imerys SA on the Imerys Group Intranet on February 12, 2014
(a)(5)(C)	Investor Presentation published by Imerys SA on February 12, 2014
(a)(5)(D)	Employee Presentation published by Imerys SA on February 12, 2014

3

EX-99.A.5.B

Exhibit (a)(5)(B)

Gilles Michel

12 February 2014

Imerys agrees to acquire AMCOL International Corporation, a global leader in bentonite

On behalf of the Board and the Executive Committee, I am pleased to announce that Imerys and AMCOL International Corporation, an Illinois-based company listed on the New York Stock Exchange, have signed a definitive merger agreement, unanimously approved by both companies’ Boards of Directors. Imerys agrees to acquire all AMCOL shares for cash consideration which values AMCOL at approximately US$1.6 billion, including its financial debt.

With revenue over US$1 billion in 2013, AMCOL is a global specialty minerals and materials player with 3,000 employees present in 26 countries and a strong US footprint. The company has a global leadership position in bentonite, a mineral with a unique scope of properties applicable to a diverse set of growing commercial applications ranging from metalcasting (automotive, machine-tool, etc.) to construction (sealing solutions) and drilling (additives), as well as a number of consumer products. AMCOL also serves the expanding oil and gas market through its Energy Services business.

The acquisition of AMCOL is expected to enhance Imerys’ global offer of mineral-based specialty solutions in diversified attractive markets. The integration of AMCOL, which is a complementary business to Imerys with a similar decentralized and innovative culture, is consistent with Imerys development strategy and the acquisition is expected to generate significant commercial and operational synergies.

Under the terms of the merger agreement, Imerys will commence a tender offer within the next ten business days for all of the outstanding common stock of AMCOL at a price of US$41 per share in cash. The tender offer is subject to customary conditions including the tender of a majority of AMCOL’s shares of common stock, on a fully diluted basis, and clearance from relevant regulatory authorities. Following the closing of the tender offer, AMCOL’s shares not tendered in the offer will be converted into the right to receive US$41 per share in cash (without interest) pursuant to the merger of a wholly owned subsidiary of Imerys into AMCOL. The transaction is expected to close in the first half of 2014.

The Executive Committee and myself are very excited with the many business and development opportunities that we believe we can create by combining our two companies, and we are looking forward to welcoming the 3,000 employees of AMCOL. Upon completion, this transaction will mark a very important milestone for Imerys by allowing our enlarged Group to become a better leader of mineral-based specialty solutions for industry, to strengthen its presence in the US, to be more innovative and to enhance its growth profile. I am convinced that this merger will create value for all of us.

Ryan McKendrick, Chief Executive Officer of AMCOL, comments: “We are pleased to announce this transaction which represents a great result for our shareholders, customers and employees. AMCOL’s core businesses will benefit significantly from Imerys’ global presence and strong financial position. This transaction will combine two complementary companies dedicated to innovation and operational excellence creating exciting opportunities for AMCOL employees while enhancing offerings for customers”.

Additional Information and Where to Find It

The tender offer described in this release has not yet commenced and this release is neither a recommendation or an offer to purchase nor a solicitation of an offer to sell shares of AMCOL. This release is not a substitute for the tender offer materials that Imerys and its wholly-owned acquisition subsidiary will file with the U.S. Securities and Exchange Commission (the “SEC”) upon commencement of the tender offer. At the time the tender offer is commenced Imerys and its wholly-owned acquisition subsidiary will file a Tender Offer Statement on Schedule TO, containing an offer to purchase, a form of letter of transmittal and other

related tender offer documents with the SEC, and AMCOL will file a Solicitation/Recommendation Statement on Schedule 14D-9 relating to the tender offer with the SEC. Imerys and AMCOL intend to mail these documents to the stockholders of AMCOL. These tender offer materials, as they may be amended from time to time, will contain important information about the tender offer and stockholders of AMCOL and other investors are urged to read them carefully and in their entirety when they become available prior to making any decisions with respect to the tender offer. Stockholders of AMCOL will be able to obtain a free copy of these documents, when they become available, at the website maintained by the SEC at www.sec.gov. The Solicitation/Recommendation Statement and the other documents filed by AMCOL with the SEC will be made available to all stockholders of AMCOL free of charge at www.amcol.com.

Forward-Looking Statements

This release contains forward-looking statements regarding, among other things, the proposed acquisition by Imerys of AMCOL and the expected timing, certainty and benefits of the transaction. Statements including words such as [“believes,” “expects,” “anticipates,” “intends,” “estimates,” “plan,” “will,” “may,” “intend,” “guidance”] or similar expressions are forward-looking statements. Because these statements reflect Imerys’ current views, expectations and beliefs concerning future events, these forward-looking statements involve risks and uncertainties. Investors should note that many factors could affect the proposed acquisition of AMCOL and could cause actual results to differ materially from those expressed in forward-looking statements contained in this release. These factors include, but are not limited to: the risk that the acquisition will not close when expected or at all; the risk that Imerys business and/or AMCOL’s business will be adversely impacted during the pendency of the acquisition; and other risks and uncertainties. Imerys assumes no obligation to publicly update any forward-looking statements, whether as a result of new information, future developments or otherwise, other than as required by law.

EX-99.A.5.C

Exhibit (a)(5)(C)

Imerys offers to acquire AMCOL

A strategic opportunity in the mineral world

Gilles MICHEL - Chairman & CEO

Michel DELVILLE - CFO

IMERYS

TRANSFORM TO PERFORM

Disclaimer

Additional Information and Where to Find It

The tender offer described in this presentation has not yet commenced and this presentation is neither a recommendation or an offer to purchase nor a solicitation of an offer to sell shares of AMCOL. This presentation is not a substitute for the tender offer materials that Imerys and its wholly-owned acquisition subsidiary will file with the U.S. Securities and Exchange Commission (the “SEC”) upon commencement of the tender offer. At the time the tender offer is commenced Imerys and its wholly-owned acquisition subsidiary will file a Tender Offer Statement on Schedule TO, containing an offer to purchase, a form of letter of transmittal and other related tender offer documents with the SEC, and AMCOL will file a Solicitation/Recommendation Statement on Schedule 14D-9 relating to the tender offer with the SEC. Imerys and AMCOL intend to mail these documents to the stockholders of AMCOL. These tender offer materials, as they may be amended from time to time, will contain important information about the tender offer and stockholders of AMCOL and other investors are urged to read them carefully and in their entirety when they become available prior to making any decisions with respect to the tender offer. Stockholders of AMCOL will be able to obtain a free copy of these documents, when they become available, at the website maintained by the SEC at www.sec.gov. The Solicitation/Recommendation Statement and the other documents filed by AMCOL with the SEC will be made available to all stockholders of AMCOL free of charge at www.amcol.com.

More comprehensive information about Imerys may be obtained on its website (www.imerys.com), under Regulated Information, including its Registration Document filed under No. D.13-0195 on March 21, 2013 with the Autorité des marchés financiers. Imerys draws the attention of investors to the “Risk factors” set forth in section 4 of the Registration Document.

Forward-Looking Statements

This presentation contains forward-looking statements regarding, among other things, the proposed acquisition by Imerys of AMCOL and the expected timing, certainty and benefits of the transaction. Statements including words such as “believes,” “expects,” “anticipates,” “intends,” “estimates,” “plan,” “will,” “may,” “intend,” “guidance” or similar expressions are forward-looking statements. Because these statements reflect Imerys’ current views, expectations and beliefs concerning future events, these forward-looking statements involve risks and uncertainties. Investors should note that many factors could affect the proposed acquisition of AMCOL and could cause actual results to differ materially from those expressed in forward-looking statements contained in this presentation. These factors include, but are not limited to: the risk that the acquisition will not close when expected or at all; the risk that Imerys’ business and/or AMCOL’s business will be adversely impacted during the pendency of the acquisition; and other risks and uncertainties. Imerys assumes no obligation to publicly update any forward-looking statements, whether as a result of new information, future developments or otherwise, other than as required by law.

IMERYS

2 Photo credits: Imerys photo library, RR, X. 2/12/2014 | Imerys offers to acquire AMCOL

Imerys offers to acquire AMCOL

Transaction highlights & timeline

AMCOL overview

Acquisition rationale and integration benefits

Conclusion

AMCOL acquisition further enhancing Imerys’ growth and value creation potential

World leading supplier in bentonite

A remarkable mineral with broad scope of applications

Largest global and high-quality mineral reserves

Strong business fit with Imerys

Value-added specialty mineral products providing essential functionalities to customers

Strong track record of profitable growth

Entrepreneurial team and innovation culture

Enhanced exposure to growth markets

60% of 2013 revenue in Americas

Significant presence in growing Asian markets

High synergy potential leveraging on Imerys’ proven integration know-how

Enlarging product offering through cross-fertilization in innovation

Leveraging combined geographical footprint

Detailed plan to conduct integration and deliver cost synergies

4 2/12/2014 | Imerys offers to acquire AMCOL

All-cash offer by Imerys for 100% of AMCOL’s shares

Key valuation metrics

$41.0 cash offer for each AMCOL’s share, representing:

19% premium to the volume weighted average closing price of AMCOL’s stock over the last 30 trading days

Total consideration of $1.6Bn(1)

Financing

Debt financing secured

Potential financial impact for Imerys

Dec. 2013 Pro forma net debt of €2Bn i.e. gearing 90%

Implied credit ratios leaving comfortable headroom vs. covenants(2) and investment grade credit rating

Transaction expected to be EPS accretive from 2015, the first full-year of integration

Process

Transaction unanimously approved by Imerys’ Board of Directors

Offer unanimously recommended by AMCOL’s Board of Directors

Closing expected in H1 2014

(1) For 100% of AMCOL’s shares, including AMCOL’s debt

(2) 150% gearing and 3.75x Net debt/ EBITDA

5 2/12/2014 | Imerys offers to acquire AMCOL

Indicative timeline

11 February 2014

Signing of definitive agreement

12 February 2014

Announcement of the transaction

13 February 2014

Imerys FY2013 results announcement

Around February 20, 2014

Commence tender offer

Tender offer period of at least 20 business days *

H1 2014

Tendering of at least 50% of the shares and clearance by the relevant regulatory authorities

Closing transaction immediately following the squeeze out of the minority shareholders in cash and at the same price

* Tender offer could be extended or potentially commence a subsequent tender offer (3 – 20 days)

6 2/12/2014 | Imerys offers to acquire AMCOL

Imerys offers to acquire AMCOL

Transaction highlights & timeline

AMCOL overview

Acquisition rationale and integration benefits

Conclusion

AMCOL: Global leading supplier of bentonite

Highlights

World leader in bentonite with largest global and high-quality reserves

Created in 1927, headquarted in Hoffman Estates, Illinois (USA)

Listed on the New York Stock Exchange (ACO)

Key financials(1)

$ MM 2010 2011 2012 2013

Sales 841 944 986 1 014

EBITDA 106 128 143 142

EBIT 70 86 98 92

Free Cash Flow 0 9 31 9

2,800 Employees

26 Countries

40+ Industrial locations

> 150 M Wet Tons of Bentonite reserves

4 R&D Centers

375 Patents

Revenue(1) $1.0 Bn

EBITDA margin(1) 14.0%

Market cap.(2) $1.1 Bn

(1) Financials based on US GAAP, Non-audited – (2013 EBITDA & EBIT excluding a $60m impairment charge booked in 2013 financials)

(2) Based on volume weighted average closing price of AMCOL’s stock over the last 30 trading days

8 2/12/2014 | Imerys offers to acquire AMCOL

AMCOL: 3 business groups serving diversified markets

Performance Materials: 48%

Americas: 55% EMEA: 22% Asia Pacific: 23%

Mines, processes and supplies globally bentonite-based specialties for a wide range of applications

End-Markets Applications

Metal casting Automotive Binding of green sands for foundry molds

Fabric & Pet care - Fragrance carrier for detergents

- Pet litters

Oilfield - Drilling fluids

Agri/bio - Edible liquids filtration

- Plant growth

Performance materials 48%

Construction technologies 22%

Energy services 29%

1%

Bentonite based

2013 Revenue breakdown by segments

Construction Technologies: 22%

Americas: 38% EMEA: 49%

Asia Pacific: 13%

Processes and distributes finished products (some with bentonite content)

End-Markets Applications

Environment Geo-synthetic liners for waste and liquid containment

Building & infrastructure Concrete waterproofing systems

Non oil-related drilling products Water-based drilling fluids

Energy Services: 29%

Americas: 86% EMEA: 7% Asia Pacific: 7%

Off and Onshore services

End-Markets Applications

Oil & gas industry - Water treatment filtration

- Frac-water recycling

- Pipeline maintenance

- Well testing services

Source : Company – non-audited

9 2/12/2014 | Imerys offers to acquire AMCOL

AMCOL: Strong US presence, global reach

Corporate HQ

Sales Office

CETCO Plant(1)

AMCOL Plant(2)

Mine

Joint Venture

Energy transmission 1%

Agriculture / horticulture 1%

Building -New 3%

Other 14%

Iron & Steel 4%

Automotive 10%

Other Consumer Goods 11%

Infrastructure 12%

Industrial Equipment 12%

Oil & Gas 32%

2013 revenue by end-market(3)

Asia Pacific 18%

Americas 60%

EMEA 22%

2013 revenue by geography(3)

(1) CETCO: Construction Technology and Energy Services Business Segments

(2) Performance Materials Business Segment

(3) Company & Imerys estimates

10 2/12/2014 | Imerys offers to acquire AMCOL

Imerys offers to acquire AMCOL

Transaction highlights & timeline

AMCOL overview

Acquisition rationale and integration benefits

Conclusion

Acquisition rationale for Imerys

1 AMCOL: perfect strategic fit with Imerys

2 Bentonite: unique mineralogical properties

Hundreds of applications with strong commercial positions in many market segments

3 Strong AMCOL track-record of above-GDP profitable growth

Positive long-term drivers and clear focus on innovation

4 Attractive positioning with robust prospects

In most dynamic end-markets and geographies

5 Energy Services: a successful development in a specialty business

6 Strong complementarity between Imerys and AMCOL

7 Imerys proven ability to quickly deliver on integration plan

12 2/12/2014 | Imerys offers to acquire AMCOL

1 AMCOL: perfect strategic fit with Imerys

Many business similarities

Ownership of long-term, high quality mineral reserves

Technology, industrial expertise

Broad range of industrial customers with manufactured specialty products

offering critical functional features

representing a small share of production costs (products or processes of customers)

Bentonite prices not subject to commodity markets evolutions

Formulation expertise

Customer-focused, service-driven

Proven innovation capabilities

Decentralized organization

Complementarity of markets served

Combination of global leading positions in many sectors

Common end-markets (Building, Foundry, Oilfield, Consumer goods, …)

But addressing adjacent needs

Business fit allowing for seamless integration

13 2/12/2014 | Imerys offers to acquire AMCOL

2 Bentonite: unique mineralogical properties

Key Properties Applications AMCOL’s presence

Foundry sands

Capability to form a plastic solid when wet

Iron ore pelletizing

Bonding

Medications: Toxin absorbents

Absorption

Pet litter

Drilling fluids

Building and Structure water proofing

Swelling/Gelling/Rheology modification

Foundation grouting

Soil sealant

Cation exchange capacity

Bleaching earth for edible oil

Adsorption capacity when activated

Clarification

Capability to combine oil particles when treated with quaternary amines (Organoclays)

Water treatment

Oil based drilling muds

Solvent based paints x

Strong commercial positions in many segments

Ownership of the world’s

World # 1 in Bentonite for Iron casting

Largest reserves of bentonite….

World # 1 in Geosynthetic Clay Liners Systems

… and highest-quality deposit in Wyoming, United States

US# 1 in Cat Litter

Leadership position in Niche Oilfield Water treatment

14 2/12/2014 | Imerys offers to acquire AMCOL

3 AMCOL: strong track-record of above GDP profitable growth

Revenue growth above world GDP

CAGR over 2003 – 2013*: c.10.5%

High resilience of EBITDA margin: c.13% on average over 2003 – 2013*

Organic growth driven by long-term positive trends…

World auto demand

Environmental constraints on building & infrastructures

Environmental friendly materials and purification needs

Oilfield exploration

* AMCOL financials based on US GAAP. 2013 financials non-audited - Aggregated financials for illustrative purposes

$ MM 2003-13A Revenue CAGR % 10.5%

12,8% 12,2% 12,4% 12,7% 14,0% 12,9% 12,7% 12,6% 13,5% 14,5% 14,0%

374 462 536 612 744 884 703 841 944 986 1,014

2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013

EBITDA margin (excluding a $60m impairment charge in 2013 financials – non audited)

… fuelled by a clear focus on innovation

Concrete waterproofing

Patented Hi-Flow technology for produced water filtration

Bio-Ag, edible oil, plant growth & animal health

IMERYS

15 2/12/2014 | Imerys offers to acquire AMCOL

4 Attractive geographic positioning and end-markets exposure

60% of the business driven by the US economy

18% of the revenue in Asia/Pacific

Strong exposure to the foundry business driven by automotive market

Enhanced exposure to growth markets (energy, automotive, consumer goods, …)

* AMCOL financials based on US GAAP. Aggregated financials for illustrative purposes

16 2/12/2014 | Imerys offers to acquire AMCOL

5 Energy Services: a successful development in a specialty market

Organic development in a fast growing specialty business over the past 10 years

Filtration & treatment of water produced by oil & gas wells (onshore & offshore) with discharge regulations or recycling requirements

Other complementary services added to water filtration, include : well testing, coiled tubing, nitrogen service, pipeline service

Development supported by:

In-house advanced knowledge of filtration (minerals or polymer based)

Entrepreneurial spirit

Water treatment benefits from long-term growth prospects

Leadership in offshore water treatment in North America, which is being leveraged on international markets

Strong growth potential related to more stringent environmental constraints in the production of US onshore unconventional oil & gas

$ MM

296 257 195 155 134 120 101 62 25 40 46 49 26 33 25 27 35 - 4 7 14

2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013

Revenue EBITDA

Offshore filtration vessels

Flow back / Well testing equipment

17 2/12/2014 | Imerys offers to acquire AMCOL

6 Strong complementarity between Imerys and AMCOL lead to significant synergies

Expected synergies over 2015-2017

Future commercial synergies

Strengthening in R&D and innovation

Complementarity and cross-fertilization on several industrial segments

Leverage on Imerys geographical strengths (India, Brazil, Europe)

Cost opportunities

Significant cost optimization identified

Capital employed opportunities

Working Capital

Capex management

18 2/12/2014 | Imerys offers to acquire AMCOL

Imerys: proven ability to quickly deliver on integration plan

Strong and successful track-record of acquisitions

More than €2Bn of investments and 76 acquisitions over 13 years

Sizeable transactions completed in the US

Proven integration process for new companies

Internal target organization designed

Integration roadmap developed

Executable integration plan

19 2/12/2014 | Imerys offers to acquire AMCOL

Imerys offers to acquire AMCOL

Transaction highlights

AMCOL overview

Acquisition rationale and integration benefits

Conclusion

AMCOL acquisition further enhancing Imerys’ growth and value creation potential

AMCOL: a world leader with strong potential for profitable growth

A significant step fully in line with 2012-2016 development strategy

Post-acquisition, comfortable headroom maintained in financial structure vs. covenants and investment grade rating

Consistent with value creation criteria

21 2/12/2014 | Imerys offers to acquire AMCOL

Imerys

154 rue de l’Université F-75007 Paris

+ 33 (0) 1 49 55 63 00 www.imerys.com

Analysts / Investors contact Pascale Arnaud

+ 33 (0) 1 49 55 63 23 pascale.arnaud@imerys.com

EX-99.A.5.D

Exhibit (a)(5)(D)

Imerys Snapshot Presentation

Dan Moncino Executive Committee member President—Filtration & Performance Additives Business Group

Disclaimer

„ Additional Information and Where to Find It

or an offer toThe tender offerpurchase described nor a in thissolicitation presentation of an offer to sell shares of Amcol. This has not yet commenced and this presentation presentation is not a is neither asubstitute recommendation for the Commission tender offer materials (the “SEC”) upon that Imerys and its wholly-ownedcommencement of the tender offer. acquisition At the time the tender offer issubsidiary will file with the U.S.commenced Securities and Imerys andExchange its wholly-owneda form of letter ofacquisition transmittal and other related tender offersubsidiary will file a Tender OfferdocumentsStatement with the SEC, andAmcol on Schedule TO, containing will file a an offer to purchase, Solicitation/Recommendation intend to mail these documents Statement to the stockholders on Schedule of Amcol. 14D-9 relating to the tender offer with the SEC. Imerys and Amcol These tender offer materials, as they may be amended from time to time, will containinvestors are urged to read themimportant carefully information and in their entirety when they about the tender offer andbecome stockholders available prior to making any of Amcol and other when they becomedecisions with respect to the tender offer. available, at the website maintained Stockholders by the SEC at www.sec.gov. The of Amcol will be able to obtain a free copy of theseSolicitation/Recommendation documents, Statement of charge at www.amcol.com. and the other documents filed by Amcol with the SEC will be made available to all stockholders of Amcol free MoreInformation, comprehensive including itsinformation Registration about Imerys may be Document filed under No. D.13-0195 obtained on its website (www.imerys.com), underon March 21, 2013 with the Autorité Regulated des marchés Document. financiers. Imerys draws the attention of investors to the “Risk factors” set forth in section 4 of the Registration

„ Forward -Looking Statements

Thisof Amcol presentation and the expected contains forward timing, -certainty looking and benefits of thestatements regarding, transaction. among other things, the Statements including proposed words such as acquisition by Imerys“believes,” forward “expects,” -looking “anticipates,” statements. “intends,” Because “estimates,” these statements “plan,” “will,” “may,” “intend,” reflect Imerys’ current views,“guidance” expectations or similar expressions and beliefs are concerning future events, these forward could affect the proposed acquisition -looking of Amcol statements and could cause actual results to differ involve risks and uncertainties. Investors materially should note that many factors from those expressed in forward acquisition will not close when-looking statements containedexpected in this or at all; the risk that presentation. These factors include, but are not limited to: the risk that the Imerys’ business and/or Amcol’s business will be adversely impacted publicly update any forward during the pendency -looking of thestatements, acquisition; and other risks andwhether as a result of new uncertainties. information, Imerys futureassumes developments no obligation or otherwise, to other than as required by law.

Feb 12, 2014 I Imerys Group

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Imerys is the world leader of mineral-based specialty products

1 PROCESS MINERALS INTO SPECIALITY MINERALS…

Mineral Functional component additive

Finished Process product enabler

4 … ALL OVER THE GLOBE. 2 … IN THOUSANDS OF APPLICATIONS …

3 … FOR DIVERSIFIED END-MARKETS …

Feb 12, 2014 I Imerys Group

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Presence in 50 countries with close to 250 industrial facilities

Energy Solutions & Specialites Carbonates Monolithic Refractories Graphite & Carbon Oilfied Solutions

Filtration & Performance Additives Performance & Filtration Minerals Kaolins

Ceramic Materials Minerals for Ceramics Building Materials

High Resistance Minerals Fused Minerals Refractory Minerals

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Imerys in the USA

2,415 employees in the US (15% of Imerys)

$US 1.03MM sales (21%)

25 plants

18 Mines

Imerys Site or Mine

Employees by Region in 2013 Employees by countries Africa 2735

2415

4%

1416

Asia Pacific: 22% 1255

1077

17% 15% 638 620 557

9%

8% 7%

4% 4% 4%

Europe: 47% South America: 9% French: 17%

North America: 18% US: 15%

Feb 12, 2014 I Imerys Group

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Boosting innovation to play a major role in expansion plan

In 2013, approx. 330 M€ of sales generated from products not in our portfolio 5 years ago (+ 32% vs. 2012)

2003 2004 2005 2006 2007 2008 2009 2010 2011 2012

Antiblocks Graphite Latex Carbonate Astrafil K, Natural DE Carbon for Cynergy, Honey comb New spray

for Fuel gloves for Wood new filler for Laminate conductive a chilled structure for castable,

Carbon Cells carbonate fibers for fiber plastics proof filter solar quick dry ,

for Li-Ion fillers composite replacement Cristal silica aid receiver monolithic

Silicone (Canada) controlled Nano refractory

rubber New alumina Diatomite dimension Low

fillers abrasive: Carbonate minerals temperature Second Argical Pro

Alodur Rod for non Barrisurf for UV porcelaine Generation A crop

woven coating body agglomerated protection

abrasives natural

product

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Strong track record of acquisitions with major deals in the US

More than €2 Bn of investments and 76 acquisitions over 13 years „ 3 major deals in the US

World Minerals (US): PyraMax Ceramics diversification into filtration €463m Talc (held by Rio Tinto): (US): new ceramic market major complement to €396m proppant plant to speed white pigment portfolio up development in this fast-growing

€230m €232m €202m €138m €94m €44m €49m €47m €59m €49m €35m €8m

2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013

Lafarge Refractories: ACE: investment into Indoporlen diversification into monolithic monolithic refractories in (Indonesia): national Itatex: expansion of refractories business India AstronChina: leader in refractory product offering for diversification products Treibacher Schleifmittel: polymers, paints and into fused Tokai Ceramics diversification into abrasives rubber markets zirconia (Japan): local market Goonvean : high business producer of purity kaolin for monolithic ceramics and refractories performance products

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Specialty products and services

Products specified and engineered , Important service dimension

Strong commercial positions

#1 or #2 on most markets

Unique process know-how

Mechanical, thermal treatment, Formulation of proprietary recipes

Decentralized organization & empowered management

Safety culture

3.09

2.46 1.69 2013

1.51 LTA=1,31

2009 2010 2011 2012

* Number of lost time accidents x 1,000 ,000 / number of work hours

Combined accident frequency rate* (employees/subcontractors )

Feb 12, 2014 I Imerys Group

8

Amcoland Imerys, a perfect fit

Many business similarities

Ownership of long-term, high quality mineral reserves

Technology, industrial expertise

Broad range of industrial customers with manufactured specialty products

Customer-focused, service-driven

Proven innovation capabilities

Decentralized organization

To grow up together

Combination of world leading positions in many sectors

Common end-markets

But addressing new needs

Story to be completed together

Feb 12, 2014 I Imerys Group

9

We are Imerys

International

Industrial

Open-minded

Action-orientated

Forward thinking

Team players

Accountable

Empowered

Value added

Compliance with laws and regulations

Business conduct and ethics with the communities

Business conduct and ethics with our employees

Business conduct and ethics shareholders

Feb 12, 2014 I Imerys Group

10

Thank youfor your attention