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". Expands to take the shape of cracks and voids, forming an airtightand water-resistant bond to wood, metal, masonry, grlass and most plastics. Reduces pathways where insects can enter. Tack-free in less than 20 min. Trims within 30 min.