Use 888 Silicone Joint Sealant to seal transverse contraction and expansion joints, longitudinal, center line, and shoulder joints in portland cement concrete. Full adhesion occurs in 14 to 21 days. The product is water-resistant and gray in color. 888 Silicone Joint Sealant meets FAAP-605 silicone sealant requirements for use in airfield applications. Dow Corning Corp.