---
product_id: 526842393
title: "West System 406-7 Colloidal Silica Epoxy Filler, 5.5 oz | Thickens Epoxy"
brand: "west system"
price: "€ 162.01"
currency: EUR
in_stock: true
reviews_count: 5
category: "West System"
url: https://www.desertcart.sk/products/526842393-west-system-406-7-colloidal-silica-epoxy-filler-5-5
store_origin: SK
region: Slovakia
---

# Boosts fairing compound strength Viscosity control precision Prevents epoxy runoff West System 406-7 Colloidal Silica Epoxy Filler, 5.5 oz | Thickens Epoxy

**Brand:** west system
**Price:** € 162.01
**Availability:** ✅ In Stock

## Summary

> 🛠️ Elevate your epoxy game — thick, strong, and drip-free every time!

## Quick Answers

- **What is this?** West System 406-7 Colloidal Silica Epoxy Filler, 5.5 oz | Thickens Epoxy by west system
- **How much does it cost?** € 162.01 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/526842393-west-system-406-7-colloidal-silica-epoxy-filler-5-5)

## Best For

- west system enthusiasts

## Why This Product

- Trusted west system brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **No More Drips or Runs:** Stay confident on vertical and overhead surfaces with zero sagging.
- • **Master Your Epoxy Flow:** Achieve perfect viscosity for flawless application every time.
- • **Stronger, Smoother Surfaces:** Enhance fairing compounds with superior strength and abrasion resistance.
- • **Seamless WEST SYSTEM Compatibility:** Customizes epoxy handling without compromising cure time or strength.
- • **Creamy Consistency, Professional Finish:** Cures to a stable off-white paste ideal for structural and aesthetic tasks.

## Overview

West System 406-7 Colloidal Silica is a premium USA-made epoxy thickening additive designed to control viscosity, prevent runoff on challenging surfaces, and enhance the strength and consistency of fairing compounds. Compatible with WEST SYSTEM epoxy resins, it cures to a creamy off-white paste, perfect for professional-grade woodworking and marine applications.

## Description

Get On The Water

Review: West system the best - Great filler from west system A++++++
Review: Good quality product - Worked exactly as expected and mixed well for my project. Reliable product and easy to use.

## Features

- Epoxy thickening additive for viscosity control – WEST SYSTEM406 Colloidal Silica is a finely powdered Made in the USA additive used to thicken epoxy and control viscosity for improved handling in specific applications.
- Prevents epoxy runoff – Adding this colloidal silica to epoxy resin and hardener mixtures helps prevent runoff on vertical and overhead surfaces, improving material placement without sagging.
- Enhances fairing compound performance – This additive can be used to improve epoxy fairing compounds by increasing strength, consistency, and abrasion resistance where a thicker body is needed.
- Cures to a creamy off-white color – Mixed into epoxy, 406 colloidal silica produces a stable, creamy off-white paste suitable for fairing and other structural tasks.
- Compatible with WEST SYSTEMepoxy systems – Designed for use with WEST SYSTEMepoxy resins and hardeners, this additive helps customize handling without altering the fundamental cure or strength of the base epoxy.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B005150RUW |
| Best Sellers Rank | #278,385 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1,169 in Epoxy Adhesives |
| Brand | WEST SYSTEM |
| Brand Name | WEST SYSTEM |
| Colour | off-white |
| Compatible Material | Fibreglass |
| Container Type | Bottle |
| Customer Reviews | 4.9 out of 5 stars 90 Reviews |
| 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 | Resin |
| 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 |
| Special Feature | Controllable viscosity, Prevention of epoxy runoff, Improved strength and consistency of fairing compounds Special Feature Controllable viscosity, Prevention of epoxy runoff, Improved strength and consistency of fairing compounds See more |
| Specific Uses For Product | Woodworking |
| UPC | 811343011505 783847056576 |
| Unit Count | 5.5 Grams |
| Volume | 5.5 Fluid Ounces |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** WEST SYSTEM
- **Item Form:** Liquid
- **Material:** Resin
- **Specific Uses For Product:** Woodworking

## Images

![West System 406-7 Colloidal Silica Epoxy Filler, 5.5 oz | Thickens Epoxy - Image 1](https://m.media-amazon.com/images/I/71fv2TtXOvL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ West system the best
*by A***S on 5 December 2025*

Great filler from west system A++++++

### ⭐⭐⭐⭐⭐ Good quality product
*by B***E on 11 May 2026*

Worked exactly as expected and mixed well for my project. Reliable product and easy to use.

### ⭐⭐⭐⭐⭐ Great stuff…not easy to work with, BE CAREFUL and go slow!!
*by M***L on 1 May 2023*

This stuff works great!! It’s not easy to mix into the epoxy, it’s so insanely light, it just floats away if you’re not very very careful!! Add a little at a time, mix inside a garage or somewhere the wind can’t get to the mixing bowl. Once it’s mixed in, it does a great job thickening up the epoxy. Great for vertical surfaces as it really holds upright well once mixed to the proper thickness.

## Frequently Bought Together

- West System 406-7 Collodial Silica 5.5oz, off-white
- West System 105 Epoxy Resin (.98Gallon 10.3-Pounds)

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**Shop now:** [https://www.desertcart.sk/products/526842393-west-system-406-7-colloidal-silica-epoxy-filler-5-5](https://www.desertcart.sk/products/526842393-west-system-406-7-colloidal-silica-epoxy-filler-5-5)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-09-03*