-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 p2AdbNFuZFmJXAezQTbXdg==

<SEC-DOCUMENT>0001260415-07-000001.txt : 20070118
<SEC-HEADER>0001260415-07-000001.hdr.sgml : 20070118
<ACCEPTANCE-DATETIME>20070118125228
ACCESSION NUMBER:		0001260415-07-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070116
FILED AS OF DATE:		20070118
DATE AS OF CHANGE:		20070118

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			DYNASIL CORP OF AMERICA
		CENTRAL INDEX KEY:			0000030831
		STANDARD INDUSTRIAL CLASSIFICATION:	GLASS, GLASSWARE, PRESSED OR BLOWN [3220]
		IRS NUMBER:				221734088
		STATE OF INCORPORATION:			NJ
		FISCAL YEAR END:			0930

	BUSINESS ADDRESS:	
		STREET 1:		385 COOPER RD
		CITY:			WEST BERLIN
		STATE:			NJ
		ZIP:			08091
		BUSINESS PHONE:		8567674600

	MAIL ADDRESS:	
		STREET 1:		385 COOPER RD
		CITY:			WEST BERLIN
		STATE:			NJ
		ZIP:			08091

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MANZI DAVID
		CENTRAL INDEX KEY:			0001175201

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-27503
		FILM NUMBER:		07537157

	BUSINESS ADDRESS:	
		STREET 1:		C/O SPECIAL OPTICS
		STREET 2:		315 RICHARD ROAD
		CITY:			WHARTON
		STATE:			NJ
		ZIP:			07885
		BUSINESS PHONE:		8567674600

	MAIL ADDRESS:	
		STREET 1:		315 RICHARD MINE ROAD
		CITY:			WHARTON
		STATE:			NJ
		ZIP:			07885
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-01-16</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000030831</issuerCik>
        <issuerName>DYNASIL CORP OF AMERICA</issuerName>
        <issuerTradingSymbol>DYSL:OB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001175201</rptOwnerCik>
            <rptOwnerName>MANZI DAVID</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>315 RICHARD MINE ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WHARTON</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>07885</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-01-16</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>80000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.4</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>80000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.4</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2007-01-16</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>80000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2004-10-14</value>
            </exerciseDate>
            <expirationDate>
                <value>2009-10-13</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>80000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <ownerSignature>
        <signatureName>David Manzo</signatureName>
        <signatureDate>2007-01-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----