OSI QUAD MAX, 9.5 OZ, #827 Blue, Siding & Window Sealant, Use Interior Or Exterior, Seals Around Windows, Doors & Siding, Bonds To Fiber Cement, Cedar, Brick, Stone, Coated Aluminum, Fiberglass, Vinyl, PVC, Stucco, EIFS, Wood, Glass, Flashing Tapes & Kynar Coatings, No Need For A Primer, Perfect Color Match For Leading Siding & Window Manufacturers.