A thickening additive used to control the viscosity of the epoxy and prevent epoxy runoff in vertical and overhead joints. 406 is a very strong filler that creates a smooth mixture ideal for general bonding and filleting. WEST SYSTEM'S most versitile filler. Often used in combination with other fillers, it can be used to improve the abraision resistance, strength and consistancy of fairing compounds, resulting in a tougher, smoother surface.
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