Alexseal® Protective Primer, White, Gallon, provides corrosionprevention for aluminum or steel, both above and below the waterline. Their mix of epoxy resin binding agents results in superior adhesion on virtually all substrates, establishing a sealed substrate that is ready for fairing. For professional use only; consult Alexseal® technical data sheets for best performance Long recoating times of Alexseal® protective primer 101 allows an economical application process