SWR Institute
400 Admiral Blvd
Kansas City, MO 64106

Product Name: DOWSIL 121 Silicone Structural Glazing Sealant
Submitted by: Dow Silicones Corporation
2200 W. Salzburg Rd.
Midland, MI 48686

Test Results
ATSM C719 Sealants Under Cyclic Movement [Hockman Cycle];
Pass: Yes
Extension: +25% Compression: -25%
Substrate: Unprimed Glass, Unprimed Anodized Aluminum, Anodized Aluminum [Aluminum with DOWSIL 1200 0S Primer and Kynar primed with DOWSIL Primer-C 0S]
Validation Date: 6/4/2020
Expiration Date: 6/3/2025
Lab Details: PRI Construction Materials Technologies LLC
6408 Badger Drive
Tampa,  FL 33610
Phone: 813.621.5777
Fax: 813.621.5840