SM855 Fusion Bonded Epoxy is a hard, mechanically strong top coating for all fusion bonded epoxy corrosion protection coatings. When applied at greater thickness, SM855 also enhances the hot, wet performance of the first layer of corrosion coating. It is applied to the base coating to form a tough outer layer that is resistant to gouge, impact, abrasion and penetration.SM855 coating is specifically designed to protect the primary corrosion coating from damage during pipeline directional drilling applications, bores, river crossing and installation in rough terrain.