While formulated to serve as low-pressure, expanding Window & Door/Insulating foam that is AAMA 812-10 compliant and will not bow window or door frames, Thermal Seal All-In-One Foam Sealant may also be used as UL-evaluated fireblocking foam for use in Type V non-rated 1 & 2 family residential construction. Closed cell content increases R-value as well as overall strength and resistance to leakage of air and water vapor.