GREAT STUFF PRO Window & Door Polyurethane Foam Sealant is a minimal-expanding foam that remains soft and flexible after curing. Creates airtight, water-resistant seals without the need for trimming. Proven not to bow or distort window and door frames when properly installed. Bonds to vinyl, wood, and metal frames. Simply pop the top off the can, attach it to the foam gun, and open the valve to apply. After finishing with your foam, leave the can on the gun, close the valve and clean the tip to store until the next use. GREAT STUFF PRO Window & Door Insulating Foam Sealant is a one-component, minimal expanding, low pressure-build, flexible polyurethane foam exclusively formulated to air seal the gap around a window or door frame and the rough opening. The foam expands to generate an effective seal and, when applied properly, is proven not to distort or bow window or door frames. Features and Benefits: Cures Flexible, won't bow window and door frames; Airtight insulating foam stops drafts; Flexible seal permits expansion/contraction; Bonds to all window types; Low-pressure formulation; Controlled dispensing. Made in the USA.