-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Vwbg+4mckgl0/Q6ASWXgfKJuCjkwHmiJ2VvbSg4YpPvcrcv0s52KP3+aywf4gMka
 5+VR3pX0AYJ1HgFpw18pgQ==

<SEC-DOCUMENT>0001179110-05-013676.txt : 20050705
<SEC-HEADER>0001179110-05-013676.hdr.sgml : 20050704
<ACCEPTANCE-DATETIME>20050705180809
ACCESSION NUMBER:		0001179110-05-013676
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050701
FILED AS OF DATE:		20050705
DATE AS OF CHANGE:		20050705

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BARNES JOSH T
		CENTRAL INDEX KEY:			0001028756

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-07755
		FILM NUMBER:		05938393

	BUSINESS ADDRESS:	
		STREET 1:		PO BOX 569
		CITY:			CHARLEVOIX
		STATE:			MI
		ZIP:			49720

	MAIL ADDRESS:	
		STREET 1:		P O BOX 244
		CITY:			CHARLEVOIX
		STATE:			MI
		ZIP:			49720

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SUMMA INDUSTRIES/
		CENTRAL INDEX KEY:			0000062262
		STANDARD INDUSTRIAL CLASSIFICATION:	PLASTICS PRODUCTS, NEC [3089]
		IRS NUMBER:				951240978
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0831

	BUSINESS ADDRESS:	
		STREET 1:		21250 HAWTHORNE BLVD
		STREET 2:		STE 500
		CITY:			TORRANCE
		STATE:			CA
		ZIP:			90503
		BUSINESS PHONE:		9092733485

	MAIL ADDRESS:	
		STREET 1:		21250 HAWTHORNE BLVD
		STREET 2:		STE 500
		CITY:			TORRANCE
		STATE:			CA
		ZIP:			90503

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SUMMA INDUSTRIES /
		DATE OF NAME CHANGE:	19960416

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MOREHOUSE INDUSTRIES INC
		DATE OF NAME CHANGE:	19920703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MAXAD INC
		DATE OF NAME CHANGE:	19740304
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-07-01</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000062262</issuerCik>
        <issuerName>SUMMA INDUSTRIES/</issuerName>
        <issuerTradingSymbol>SUMX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001028756</rptOwnerCik>
            <rptOwnerName>BARNES JOSH T</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>P.O. BOX 244</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CHARLEVOIX</rptOwnerCity>
            <rptOwnerState>MI</rptOwnerState>
            <rptOwnerZipCode>49720</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-07-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>3000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>8.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>43040</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Includes 15,000 shares held by charitable remainder trust and 28,040 in living trust</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <ownerSignature>
        <signatureName>Josh T. Barnes</signatureName>
        <signatureDate>2005-07-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----