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West System 404 high density filler for high strength bonding when added to epoxy resin mix. A filler designed to maximise bond strength in hardware bonding where high cyclic loads are anticipated. It can also be used for filleting and gap filling applications. Add 35% to 60% by weight, depending on the viscosity required. colour off-white. High density filler CAN NOT be used without an epoxy mix. PLEASE ALSO NOTE the pack will appear part full, however this is correct, due to the high density makeup of this product.