Ultrabond® (Shot Shell Crimp Sealant) 55391 is a UV cure adhesive and sealant. This product is specially formulated to seal the shotgun shell crimp upon exposure of 2 seconds to a UV light. 55391 offers an excellent watertight seal with excellent environmental resistance. This sealant is visible under exposure to black light for vision inspection; this feature combined with the fast cure capability makes this sealant ideal for high-speed production. Hernon® offers high-speed curing and inspection systems.