DOWSIL™ 983 Structural Glazing Sealant is a two-part, neutral-cure, RTV silicone sealant. Designed for specialized use where dual structural and weatherseal applications are desired for factory glazing and curtainwall production. It has excellent unprimed adhesion to glass, alodine, and anodized aluminum1, although DOWSIL™ Primer-C OS is recommended for fast and consistent adhesion, especially to Kynar™ and other high-performance substrates approved for architectural structural glazing applications.