ItEEfs easy to form durable, airtight, water-resistant bonds to vinyl, wood and metal frames. This one-component, minimal-expanding, low pressure-build, flexible polyurethane foam is exclusively formulated to air seal the gap between a window or door frame and its rough opening. The foam expands only enough to generate an effective seal. When applied properly, GREAT STUFF PRO? Window & Door is proven not to distort or bow window and door frames. GREAT STUFF PRO? Window & Door Insulating Foam Sealant is designed to form a durable, airtight, water-resistant bond to vinyl, wood and metal surfaces. Its foam skin repels and deflects water, which can help reduce the potential for moisture damage in frame openings
