High performance polyurethane adhesive/sealant becomes tack free in 48 hours, and cures completely in 5-7 days. Retains its strength below & above the waterline. Stays flexible allowing for structural movement. Excellent resistance to weathering & salt water. Remains workable with trowel or spatula for up to 4 hours after application. Won't sag or flow in vertical or horizontal seams. Available in white or black.