GREAT STUFF PRO Window & Door 20 oz Insulating Foam Sealant Must be used with GREAT STUFF PRO Series Dispensing Gun, sold separately Made in U.S Exclusively formulated to air seal the gap between a window and a door frame and its rough opening Minimal-expanding, low pressure foam that will not bow or bend window or door frame Forms durable, airtight, water-resistant bonds to vinyl, wood and metal frames One 20oz can foams between 15-18 normal sized windows