DOWSIL™ 983 Structural Glazing Sealant is a two-part, neutral-cure, RTV silicone sealant. It is a two-part silicone formulation. As supplied, the base is a smooth, white paste. Once catalyzed, the material cures to a high-modulus, flexible silicone rubber that is flexible for use in structural and/or weatherseal applications. It is compatible with reflective glass, laminated glass, and most insulating glass. It can be used in deep, narrow joints to obtain a full and complete cure.

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.