A non-bleeding, anti-corrosive primer that provides an excellent barrier on underwater metal surfaces, reducing galvanic corrosion. Use on underwater metal areas including aluminum outdrives and outboards, stainless steel, bronze props and shafts prior to application of Micron CF, Pacifica Plus, Trilux 33 Aerosol or Trilux 33. Use at least one full can of primer per lower unit. Easy-to-use aerosol An anticorrosive primer for underwater metal surfaces including hulls, runnng gear and lower units of outboards and I/O's Reduce pitting of the metal from galvanic corrosion