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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 EtC31yGIefIo5BgMVVL9SvaMfASnMdtBGnfFojUSZUGkDfHSvCWTDzkmbdy14G7v
 ID/HCSC4r8XiLw29kvtvxw==

<SEC-DOCUMENT>0001179110-03-012768.txt : 20031216
<SEC-HEADER>0001179110-03-012768.hdr.sgml : 20031216
<ACCEPTANCE-DATETIME>20031216161724
ACCESSION NUMBER:		0001179110-03-012768
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031212
FILED AS OF DATE:		20031216

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SEALED AIR CORP/DE
		CENTRAL INDEX KEY:			0001012100
		STANDARD INDUSTRIAL CLASSIFICATION:	CONVERTED PAPER & PAPERBOARD PRODS (NO CONTAINERS/BOXES) [2670]
		IRS NUMBER:				650654331
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		PARK 80 EAST
		CITY:			SADDLE BROOK
		STATE:			NJ
		ZIP:			07663-5291
		BUSINESS PHONE:		2017917600

	MAIL ADDRESS:	
		STREET 1:		PARK 80 EAST
		CITY:			SADDLE BROOK
		STATE:			NJ
		ZIP:			07663-5291

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	WR GRACE & CO/DE
		DATE OF NAME CHANGE:	19961015

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	GRACE HOLDING INC
		DATE OF NAME CHANGE:	19960805

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			DUNPHY T J DERMOT
		CENTRAL INDEX KEY:			0001195833

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12139
		FILM NUMBER:		031057652

	BUSINESS ADDRESS:	
		STREET 1:		C/O KILDARE ENTERPRISES LLC
		STREET 2:		34 CHURCH ST
		CITY:			LIBERTY CORNER
		STATE:			NJ
		ZIP:			07938
		BUSINESS PHONE:		9085809760

	MAIL ADDRESS:	
		STREET 1:		C/O KILDARE ENTERPRISES LLC
		STREET 2:		34 CHURCH ST
		CITY:			LIBERTY CORNER
		STATE:			NJ
		ZIP:			07938
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>
<periodOfReport>2003-12-12</periodOfReport>
<notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0001012100</issuerCik>
        <issuerName>SEALED AIR CORP/DE</issuerName>
        <issuerTradingSymbol>SEE</issuerTradingSymbol>
</issuer>
<reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001195833</rptOwnerCik>
            <rptOwnerName>DUNPHY T J DERMOT</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O SEALED AIR CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>PARK 80 EAST</rptOwnerStreet2>
            <rptOwnerCity>SADDLE BROOK</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>07663</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>2003-12-12</value>
</transactionDate>
<transactionCoding><transactionFormType>4</transactionFormType>
<transactionCode>S</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionAmounts><transactionShares><value>20000</value>
</transactionShares>
<transactionPricePerShare><value>53.1347</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode><value>D</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts><sharesOwnedFollowingTransaction><value>442654</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature><directOrIndirectOwnership><value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeTransaction><securityTitle><value>Common Stock</value>
</securityTitle>
<transactionDate><value>2003-12-15</value>
</transactionDate>
<transactionCoding><transactionFormType>4</transactionFormType>
<transactionCode>S</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionAmounts><transactionShares><value>17800</value>
</transactionShares>
<transactionPricePerShare><value>53.7801</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode><value>D</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts><sharesOwnedFollowingTransaction><value>424854</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature><directOrIndirectOwnership><value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeHolding><securityTitle><value>Common Stock</value>
</securityTitle>
<postTransactionAmounts><sharesOwnedFollowingTransaction><value>34100</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature><directOrIndirectOwnership><value>I</value>
</directOrIndirectOwnership>
<natureOfOwnership><value>By Self as Custodian for Family Member</value>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeHolding>
<nonDerivativeHolding><securityTitle><value>Common Stock</value>
</securityTitle>
<postTransactionAmounts><sharesOwnedFollowingTransaction><value>68410</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature><directOrIndirectOwnership><value>I</value>
</directOrIndirectOwnership>
<natureOfOwnership><value>By Profit-Sharing Plan</value>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeHolding>
</nonDerivativeTable>
<derivativeTable></derivativeTable>
<footnotes></footnotes>
<ownerSignature><signatureName>T. J. Dermot Dunphy</signatureName>
<signatureDate>2003-12-16</signatureDate>
</ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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