Interlux TRILUX 33 , Hard antifouling for aluminum in Bright Colors. For Fiberglass, Wood, Steel and Aluminum -Red. .*HAZARDOUS* This item is considered hazardous freight. Additional freight charges may apply to your order at time of shipment. Trilux 33 a new tin-free antifouling formulated to provide safe, effective protection for aluminum boats, outdrives & outboards, or where a bright color or bright white is required. It is based on the latest Biolux Technology, for improved control of slime and algae growth. It replaces Trilux and Micron 33. Trilux 33 is for use below the waterline on underwater boat hulls and parts