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West System 406-7 Colloidal Silica is a high-viscosity epoxy additive designed to control flow and prevent runoff on vertical and overhead surfaces. It enhances the strength, abrasion resistance, and consistency of epoxy fairing compounds, curing to a professional off-white finish. Ideal for marine, automotive, and industrial applications, it’s a trusted solution with a 4.9-star rating and proven durability.



















| ASIN | B005150RUW |
| Best Sellers Rank | #46,447 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #66 in Tile Epoxy Adhesives |
| Brand Name | West System |
| Color | off-white |
| Compatible Material | Fiberglass |
| Container Type | Can |
| Customer Reviews | 4.9 4.9 out of 5 stars (101) |
| Full Cure Time | 24 Hours |
| Global Trade Identification Number | 00811343011505 |
| Included Components | FILLER COLLOIDAL SILICA 5.5 OZ |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Type Name | MARINE ACCESSORIES |
| Item Weight | 5.5 Ounces |
| Manufacturer | WEST SYSTEM |
| Material Type | Colloidal Silica |
| Model | 406-7 |
| Number of Pieces | 1 |
| Other Special Features of the Product | Controllable viscosity, Prevention of epoxy runoff, Improved strength and consistency of fairing compounds |
| Part Number | 406-7 |
| UPC | 811343011505 783847056576 |
| Unit Count | 5.5 Ounce |
| Viscosity Level | High |
| Volume | 5.5 Fluid Ounces |
| Warranty Description | Limited Warranty |
| Water Resistance Level | Water Resistant |
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