The West System 406 Colloidal Silica is their most versatile filler, producing a very strong and smooth consistency when mixed with West System Epoxy.
As a thickening additive, West System 406 is commonly used to improve the viscosity of the epoxy, preventing running adhesive in vertical or overhead joints. It is also used in combination with other fillers such as West System 407, improving the overall strength and abrasion resistance along with leaving a tougher and smoother surface.
West System 406 Colloidal Silica Data Sheet
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