Pettit Protect Gray High Build Epoxy Barrier Primer Coat Pettit Protect Epoxy Primer is a heavy-duty, dual component epoxy coating best used where maximum resistance to fresh or salt water is a necessity. By reducing water absorption in fiberglass hulls, its an excellent choice for the prevention of osmotic blisters. Pettit Protects high-solids formula allows for a speedy application by requiring fewer coats for effective hull protection. An additional application of Pettit Protect Epoxy Primer