Exo-coat is a very durable outer fuel tank coating that seals the exterior of your tank for added corrosion resistance and sealing. It is a urethane coating which combines the superior adhesion of urethane with plastic fibers for added strength. This product brushes on and dries to a rock hard protective coating. Because of the plastic fibers, the overall appearance of the coating is uneven or rough. The high gloss makes your finished tank look very professional. This product is recommmended when you have excessive pinholes in your tank. 1 pint can.