West System 420 Aluminum Powder

West System 420 Aluminum Powder is a coating additive you stir into mixed 105 epoxy for a harder, more abrasion-resistant surface with better moisture resistance. It cures metallic gray, gives limited UV protection where the epoxy will not be covered by another coating, and works as a base for paint.How much to addAdd 5 to 10% by volume, about 1½ tablespoons per 8 fl oz of mixed epoxy. One 36 oz can modifies up to 5 gallons of mixed epoxy. Stir it into resin and hardener that are already mixed. West lists it for fiberglass repairs, reusable mold surfaces, boat bottoms and composite aluminum castings. Fine aluminum powder, 98 to 100% aluminum, 50 to 60 micron average particle size 420-36: 36 oz (1,020 g) can Cures metallic gray; harder, more abrasion- and moisture-resistant coating Limited UV protection; can be painted over For West System 105 resin with any 200-series hardener Coating a fiberglass hull to keep water out? 422 Barrier Coat Additive is the West additive built for blister prevention. For a slick, low-friction coat on rudders and centerboards, see 423 Graphite Powder.