West System® 404 High Density Adhesive Filler. An epoxy thickening additive with a "fine" fiber blend. Developed for maximum physical adhesive properties in hardware bonding or anywhere that high-cyclic loads are anticipated. Designed for wood bonding, adhesion, gap filling and fastener bonding. Use for structural fillets or anywhere an especially strong bond is needed. Can be blended into any West System® 105 Epoxy Resin®/200 Series Hardener combination, West System® G/flex® 650 or West System® G/5® Five Minute Adhesive. Cures to an off-white color. Off-White. 43 oz.