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. It stays flexible and can be applied in extreme wet or dry conditions, even down to 0°F. Permanently flexible- exceeds rigorous ASTM C-920 Class 50 testing.