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SWR Institute
400 Admiral Blvd
Kansas City, MO 64106
816.472.7974
info@swrionline.org

Product Name: DOWSIL™ Contractors Weatherproofing Sealant (CWS)
Submitted by: Dow Silicones Corporation
2200 W. Salzburg Road
Midland, MI 48686
AHlinka@dow.com
dow.com/construction

Test Results
ASTM C 719 Adhesion and Cohesion of Elastomeric Joint Sealants Under Cyclic Movement [Hockman Cycle]; Pass: Yes Extension: +35% Compression: -35% Substrate: Unprimed Glass, Unprimed Aluminum, Primed Mortar [Mortar substrate was primed with DOWSIL™ Primer P]
Validation Date: 6/30/2026
Expiration Date: 6/29/2031
Lab Details: Interek
130 Derry Court
York,  PA 17406
Phone: 717.764.7700
Fax: 717.764.4129