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West System 406-7 Colloidal Silica is a premium epoxy thickening additive designed to control viscosity, prevent runoff, and enhance the strength and abrasion resistance of epoxy fairing compounds. Ideal for vertical and overhead applications, it cures to an off-white color and is water-resistant, making it a trusted choice for marine, woodworking, and fiberglass repairs.



















| ASIN | B005150RUW |
| Best Sellers Rank | #274,847 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1,170 in Epoxy Adhesives |
| Brand Name | WEST SYSTEM |
| Colour | off-white |
| Compatible Material | Fibreglass |
| Container Type | Bottle |
| Country of Publication | USA |
| Customer Reviews | 4.9 4.9 out of 5 stars (89) |
| 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 |
| Manufacturer Part Number | 406-7 |
| Material Type | Resin |
| 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 |
| Specific Uses For Product | Woodworking |
| UPC | 811343011505 783847056576 |
| Unit Count | 5.5 Grams |
| Volume | 5.5 Fluid Ounces |
| Water Resistance Level | Water Resistant |
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