The Resisto 24721 Alsan Foam UNI-W PRO is a one-component, low-expansion polyurethane foam specifically formulated for use in the widest range of climates and temperatures from -13°F to 86°F. It is ideal for windows, doors, gaps and cracks, exterior and interior uses. It can also air seal gaps around rough openings of windows and doors, stop drafts, and save energy with a permanent, airtight, water-resistant bonds to vinyl, wood and metal.