... effective antifouling agent in marine paint; Formulated with Sodium Pyrithione ,Copper Pyrithione ,DDT, TBT, it is a perfect antifouling agent ... antifouling paint with Cuprous Oxide will oxidized into Alkali Copper Carbonate and lose effectiveness. 3. Antifouling marine paint ... effect than Cuprous Oxide .Just owing to less copper content,Cuprous thiocyanate is known as environmental friendly product ...