Geocel 4350 provides a strong, long-lasting bond to PVDF, SMP, and polyester-coated steel, bare galvanized, galvalume metal panels, aluminum, copper, skylights, glass, brick, block, wood and vinyl siding. Stay flexible and can be applied in extreme wet or dry conditions, even down to 0 degrees F. Features: Long lasting watertight seal- won’t shrink Permanently flexible- exceeds rigorous ASTM C-920 Class 50 testing Apply in wet or dry in challenging weather conditions down to 0 degrees F. Strong lasting bond. For use on PVDF, SMP, and polyester-coated steel bare galvanized Galvalume® metal panels Aluminum Copper Skylights Glass Brick and block Wood Vinyl siding Asphalt shingles. Color Burnished Slate.