DAP INC 7079818416 DYNAFLEX 230 Clay 10.1 Oz Raw Building Material, 10.1-Ounce DAP DYNAFLEX 230 delivers a "Silicone Tough" latex formulation for outstanding exterior performance against the elements. Developed for flexibility and crack proof performance, this sealant endures expansion and contraction without cracking or losing its seal. The paintable, durable sealant can fill gaps up to 1" wide and the cured sealant is mold and mildew resistant. It has excellent adhesion to a wide range of building materials including wood, MDF, PVC, polystyrene, and composite trimboard. Meets ASTM Specification C920, Class 25. Meets TT-S-00230C, Type II, Class A & ASTM C 920, Class 25 Has a water tight and weatherproof seal Flexible, durable and paintable