West System 405 Filleting Blend Adhesive Filler is a strong, wood-toned epoxy filler. Can be blended with other WEST SYSTEM Fillers to modify the shade of your epoxy mix. Can blend it into any WEST SYSTEM 105 Resin/Hardener combination, G/flex Epoxy 650, or G/5 Five-Minute Adhesive. When you thicken epoxy to a non-slumping consistency, it can bridge large gaps. With high-density fillers, this means you can make wood joints without sacrificing strength. This saves you time and effort in creating a strong joint. A fillet is a continuous bead of thickened epoxy you apply to the joint angle between two parts. It increases the surface area of the bond and serves as a structural adhesive and brace. Fillets are an effective glue joint that requires no fasteners of any kind. A fillet can be just as strong as the parts it’s joining together. Using fillets saves the time and effort otherwise needed for strong, reliable joinery.