---
product_id: 526842393
title: "West System 406-7 Collodial Silica 5.5oz, off-white"
brand: "west system"
price: "€ 134.81"
currency: EUR
in_stock: true
reviews_count: 5
category: "West System"
url: https://www.desertcart.pt/products/526842393-west-system-406-7-collodial-silica-5-5oz-off-white
store_origin: PT
region: Portugal
---

# Boosts strength & abrasion resistance Controls epoxy viscosity precisely Prevents epoxy runoff on vertical surfaces West System 406-7 Collodial Silica 5.5oz, off-white

**Brand:** west system
**Price:** € 134.81
**Availability:** ✅ In Stock

## Summary

> 🛠️ Elevate your epoxy game — don’t let your projects run away!

## Quick Answers

- **What is this?** West System 406-7 Collodial Silica 5.5oz, off-white by west system
- **How much does it cost?** € 134.81 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/526842393-west-system-406-7-collodial-silica-5-5oz-off-white)

## 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

- • **Enhanced Durability:** Reinforce your projects with superior strength and abrasion resistance
- • **Precision Viscosity Control:** Master your epoxy flow with exact thickness every time
- • **Seamless Fairing Consistency:** Achieve flawless, smooth finishes that stand out
- • **Trusted Marine-Grade Quality:** Backed by West System’s industry-leading reputation and 4.9-star reviews
- • **Vertical & Overhead Stability:** Say goodbye to drips and runs on tricky surfaces

## Overview

West System 406-7 Colloidal Silica is a premium epoxy thickening additive designed to precisely control viscosity, prevent runoff on vertical and overhead joints, and enhance the strength and abrasion resistance of epoxy fairing compounds. Curing to an off-white color, this 5.5oz liquid filler is ideal for woodworking and marine applications, delivering professional-grade results trusted by experts.

## Description

Get On The Water

Review: West system the best - Great filler from west system A++++++
Review: Great stuff…not easy to work with, BE CAREFUL and go slow!! - 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.

## Features

- 406 Colloidal Silica is an epoxy thickening additive used to control the viscosity of the epoxy.
- Prevents epoxy runoff in vertical and overhead joints.
- Can be used to improve strength, abrasion resistance, and consistency of epoxy fairing compounds.
- Cures to an off-white color.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B005150RUW |
| Best Sellers Rank | #214,190 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1,036 in Epoxy Adhesives |
| Brand | WEST SYSTEM |
| Brand Name | WEST SYSTEM |
| Colour | off-white |
| Compatible Material | Fibreglass |
| Container Type | Bottle |
| Country of Publication | USA |
| Customer Reviews | 4.9 out of 5 stars 83 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 | Colloidal Silica |
| 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 |
| 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 |
| Viscosity Level | High |
| Volume | 5.5 Fluid Ounces |
| Water Resistance Level | Water Resistant |

## Product Details

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

## Images

![West System 406-7 Collodial Silica 5.5oz, off-white - 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++++++

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ Versatile thickener for West Systems epoxy
*by E***N on 18 April 2026*

I’ve used West Systems for probably 50 years. After the initial learning curve, it’s hard to use anything else. I use 406 on a majority of my glue joints. Measure it out into cut-down McDonalds cups using a gram scale for as little as 6 grams or for how many grams your container can hold. It makes a self-filling, durable joint in so many applications. Add as much 406 to epoxy for the thickness you need to make super strong joints.

## 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.pt/products/526842393-west-system-406-7-collodial-silica-5-5oz-off-white](https://www.desertcart.pt/products/526842393-west-system-406-7-collodial-silica-5-5oz-off-white)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-06-26*