A high-build, two-part epoxy primer that dries fast and enables application of a complete barrier system and bottom paint in just two days. Extremely effective for blister prevention on fiberglass, or as a bilge coating, Tuff Stuff is resistant to oil and water. It can be used as a universal primer for corrosion protection on most metals below the waterline such as props, keels, trim tabs, thru-hulls, and lower units or for priming any other metal surface. Effective for blister prevention on fiberglass Resists oil and water Universal primer for most metal surfaces | Tuff Stuff Light Grey Primer Kit, 2 Gallons