BOSS 333 33316 Expanding Foam Sealant, 24 hr Functional Cure, 40 to 115 deg F, 12 oz Aerosol Can

BOSS 333 is a ready to use, multi-purpose, polyurethane foam that expands to three times its original volume when in contact with air. This volume expansion capability fills holes, cracks and gaps more completely than standard caulks. The product also has excellent insulating properties and superb adhesion to virtually all building materials.