Q. What did all the old sailing ships sheath their hulls in?
Copper-Boost is 100% PURE Copper powder.
Use the Copper-Boost additive and say Cu Barnacles.
This is not Cuprous Oxide "Cu2O" which is used by manufacturers of antifoul.
This is 100% PURE Copper.
1 x 500g pack/4ltr tin of antifouling is all you need.
Can be added to ablative or hard, solvent or water based antifouling