<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-09-24</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001053676</issuerCik>
        <issuerName>SIELOX INC</issuerName>
        <issuerTradingSymbol>SLXN.OB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001254583</rptOwnerCik>
            <rptOwnerName>MITAROTONDA JAMES A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O BARINGTON CAPITAL GROUP, L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>888 SEVENTH AVENUE, 17TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>See Remarks</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001107149</rptOwnerCik>
            <rptOwnerName>BARINGTON COMPANIES EQUITY PARTNERS L P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>888 SEVENTH AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>17TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>See Remarks</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001324904</rptOwnerCik>
            <rptOwnerName>Barington Companies Investors, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>888 SEVENTH AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>17TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>See Remarks</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000887762</rptOwnerCik>
            <rptOwnerName>BARINGTON CAPITAL GROUP L P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>888 SEVENTH AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>17TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>See Remarks</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001324903</rptOwnerCik>
            <rptOwnerName>LNA Capital Corp.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>888 SEVENTH AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>17TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>See Remarks</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001324905</rptOwnerCik>
            <rptOwnerName>Barington Companies Offshore Fund, Ltd. (BVI)</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O BISON FINANCIAL SERVICES LIMITED</rptOwnerStreet1>
            <rptOwnerStreet2>BISON COURT, ROAD TOWN</rptOwnerStreet2>
            <rptOwnerCity>TORTOLA</rptOwnerCity>
            <rptOwnerState>D8</rptOwnerState>
            <rptOwnerZipCode></rptOwnerZipCode>
            <rptOwnerStateDescription>VIRGIN ISLANDS, BRITISH</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>See Remarks</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001390336</rptOwnerCik>
            <rptOwnerName>Barington Offshore Advisors II, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>888 SEVENTH AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>17TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>See Remarks</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-09-24</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>461538</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2095948</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Barington Capital Group, L.P.</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1051873</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Barington Companies Equity Partners, L.P.</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>832320</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Barington Companies Offshore Fund, Ltd.</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Transaction reflects the issuance of shares of common stock of the Issuer, in consideration of services rendered by Barington Capital Group, L.P. to the Issuer and L Q Corporation, Inc. (&quot;L Q Corporation&quot;) in connection with the merger contemplated by the Amended and Restated Agreement and Plan of Merger, dated as of February 26, 2007, as amended, by and among the Issuer (at such time known as Dynabazaar, Inc.), L Q Corporation and LQ Merger Corp. (&quot;LMC&quot;), whereby LMC was merged with and into L Q Corporation.</footnote>
        <footnote id="F2">As the general partner of Barington Companies Equity Partners, L.P., Barington Companies Investors, LLC may be deemed to beneficially own the shares of Common Stock beneficially owned by Barington Companies Equity Partners, L.P. As the investment advisor to Barington Companies Offshore Fund, Ltd., Barington Offshore Advisors II, LLC may be deemed to beneficially own the shares of Common Stock beneficially owned by Barington Companies Offshore Fund, Ltd.  As the majority member of Barington Companies Investors, LLC and Barington Offshore Advisors II, LLC, Barington Capital Group, L.P. may be deemed to beneficially own the shares of Common Stock beneficially owned by Barington Companies Equity Partners, L.P. and Barington Companies Offshore Fund, Ltd.</footnote>
        <footnote id="F3">(Continuation of Footnote 2) As the general partner of Barington Capital Group, L.P., LNA Capital Corp. may be deemed to beneficially own the shares of Common Stock beneficially owned by Barington Companies Equity Partners, L.P., Barington Companies Offshore Fund, Ltd. and Barington Capital Group, L.P. James A. Mitarotonda is the sole stockholder and director of LNA Capital Corp. and therefore may be deemed to beneficially own the shares of Common Stock beneficially owned by Barington Companies Equity Partners, L.P., Barington Companies Offshore Fund, Ltd. and Barington Capital Group, L.P.</footnote>
        <footnote id="F4">The Reporting Persons disclaim beneficial ownership of these securities except to the extent of their pecuniary interest therein, and this report shall not be deemed to be an admission that the Reporting Persons are the beneficial owners of these securities for purposes of Section 16 or for any other purpose.</footnote>
        <footnote id="F5">Excludes shares owned directly by Barington Companies Equity Partners, L.P. and Barington Companies Offshore Fund, Ltd.</footnote>
    </footnotes>

    <remarks>Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding common stock.</remarks>

    <ownerSignature>
        <signatureName>BARINGTON COMPANIES EQUITY PARTNERS, L.P., By: Barington Companies Investors, LLC, its general partner, By: /s/ James A. Mitarotonda, its managing member</signatureName>
        <signatureDate>2007-09-26</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>BARINGTON COMPANIES INVESTORS, LLC, By: /s/ James A. Mitarotonda, its managing member</signatureName>
        <signatureDate>2007-09-26</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>BARINGTON COMPANIES OFFSHORE FUND, LTD., By: /s/ James A. Mitarotonda, its president</signatureName>
        <signatureDate>2007-09-26</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>BARINGTON OFFSHORE ADVISORS II, LLC, By: /s/ James A. Mitarotonda, its managing member</signatureName>
        <signatureDate>2007-09-26</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>BARINGTON CAPITAL GROUP, L.P., By: LNA Capital Corp., its general partner, By: /s/ James A. Mitarotonda, its president and CEO</signatureName>
        <signatureDate>2007-09-26</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>LNA CAPITAL CORP., By: /s/ James A. Mitarotonda, its president and CEO</signatureName>
        <signatureDate>2007-09-26</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ James A. Mitarotonda</signatureName>
        <signatureDate>2007-09-26</signatureDate>
    </ownerSignature>
</ownershipDocument>
