Primocon is an anti-corrosive primer for all underwater metal surfaces. Primocon provides an excellent barrier to reduce pitting caused by galvanic corrosion. For non-aluminum underwater metal use any (non-vinyl) Interlux antifouling paint. An excellent primer for antifouling paint over sanded fiberglass. Primocon can be used as a conversion coating over unknown well-adhered antifouling paint to prevent cracking of new antifouling paint. Primocon will not affect the color of antifouling paint. An excellent primer for antifouling paint over sanded fiberglass An anticorrosive primer for underwater metal surfaces including hulls, running gear and lower units of outboards and I/O's Reduce pitting of the metal from galvanic corrosion