West System 406 general purpose thickening additive suitable for bonding gap-filling and filleting. The colloidal silica adhesive filler can be used to prevent resin flow on vertical and overhead surfaces and to control the viscosity of the epoxy. Add 3% to 8% by weight to the resin/hardener mix. Thicken blended resin/hardener to create a multi-purpose adhesive ideal for smooth finishes, increasing strength of fairing compounds and joints.
Colour: Off-White.
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