Primocon Aerosol Primer is an anticorrosive primer formulated for underwater metal areas including aluminum lower units and I/O's, stainless steel and bronze props and shafts prior to the application of Trilux Prop and Drive, Trilux 33, Trilux II or Trilux. It will provide an excellent barrier to reduce pitting of the metal from galvanic corrosion. Can be used under all International antifoulings or as a barrier/sealer coat over incompatible or unknown antifoulings. Primocon Aerosol meets the stringent California MIR Requirements. Do not overcoat with TBT based paint.