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SWR Institute
400 Admiral Blvd
Kansas City, MO 64106

Product Name: DOWSIL Contractors Weatherproofing Sealant (CWS)
Submitted by: Dow Silicones Corporation
2200 W. Salzburg Road
Midland, MI 48686

Test Results
ASTM C 719 Adhesion and Cohesion of Elastomeric Joint Sealants Under Cyclic Movement [Hockman Cycle]; Pass: Yes Extension: +35% Compression: -35% Substrate: Primed mortar, glass and aluminum. [Mortar substrate was primed with DOWSIL Construction Primer P]
Validation Date: 1/26/2020
Expiration Date: 1/25/2026
Lab Details: Architectural Testing
130 Derry Court
York,  PA 17406
Phone: 717.764.7700
Fax: 717.764.4129