Hard Matrix Antifouling (Cdp TechnVolvogy). Suitable For High-Actiity Boats And Particularly Suitable For Temperate Waters. The Product, Formulated With Copper Salts, Is Not Compatible With Aluminum Hulls Due To The Risk Of Galanic Currents. The White Version Can Be Used On Aluminum And Alloys, While The CVolvored Versions Are Not Compatible With These Surfaces.