


🧩 Master the art of epoxy with flawless control and strength!
West System 406-2 Colloidal Silica is a premium epoxy thickening additive designed to control viscosity and prevent runoff in challenging vertical and overhead applications. It enhances the strength, abrasion resistance, and consistency of epoxy fairing compounds, curing to a clean off-white finish. Trusted by professionals for its purity and reliable performance in automotive and specialty repairs.

| ASIN | B0000AY1OC |
| Best Sellers Rank | #23,746 in Automotive ( See Top 100 in Automotive ) #73 in Care Corrosion & Rust Inhibitors #1,079 in Oils & Fluids |
| Date First Available | October 1, 2001 |
| Department | unisex-adult |
| Is Discontinued By Manufacturer | No |
| Item Weight | 5 ounces |
| Item model number | 406-2 |
| Manufacturer | Gougeon Brothers, Inc. |
| Product Dimensions | 23 x 15 x 8 inches |
G**Y
West System awesomeness
I’ve dealt with a couple of epoxy brands over the years and West System’s is by far the best all around system that includes both epoxy and fillers. These fillers are a bit pricy when you factor in the weight or volume but they work just like fillers should. I have yet to encounter any negative issues with these fillers, and they all appear to be packaged in a professional environment. The fillers come bone dry and don’t have any impurities in them.
A**L
Great product
Just sticking her really helps when I am trying to fill cavities or I need structural hold do recommend it
J**D
Works great as an epoxy thickener
I mixed some of this colloidal silica with a 2 part epoxy glue to thicken it up. The more you add the thicker the glue mixture gets. The powder is super light, and floats everywhere, so a mask is not a bad idea. Handle it slowly and carefully.
Y**S
Good to Have
Here in Hawaii, even Ace Hardware doesn't have this. Thank you for Amazon to sell this.
N**E
Amazing Product
Used it to add to gelcoat during a crack repair on our boat and it is amazing. ALWAYS USE A RESPIRATOR!!! This is a very fine dust and it will damage your lungs.
B**L
Good product
About this product to fix my Hoosier cabinet. it done a fantastic job.
R**Y
Works well
Similar to other brand products and delivered very quickly. No complaints.
T**T
versatile
I've used this stuff for 40 plus years. Great for patching with epoxy and polyester.
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