For general-purpose building envelope air sealing. Resist the free passage of flames to other areas of the building through concealed spaces. Fills and seals gaps up to 3 in. Expands to take the shape of cracks and voids, forming an air-tight and water-resistant bond to wood, metal, masonry, glass and most plastics. Reduces pathways where insects can enter. Tack-free in less than 20 mins. Trims within 30 mins.