---
product_id: 526842393
title: "West System 406-7 Colloidal Silica Epoxy Filler, 5.5 oz | Thickens Epoxy"
brand: "west system"
price: "B/.278"
currency: PAB
in_stock: true
reviews_count: 5
url: https://www.desertcart.com.pa/products/526842393-west-system-406-7-colloidal-silica-epoxy-filler-5-5
store_origin: PA
region: Panama
---

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

**Brand:** west system
**Price:** B/.278
**Availability:** ✅ In Stock

## Summary

> 🛠️ Elevate your epoxy game — thick, strong, and flawless 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?** B/.278 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/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:** Prevents epoxy sagging on vertical and overhead surfaces for clean, professional finishes.
- • **Master Your Epoxy Flow:** Precisely control viscosity for flawless application every time.
- • **Stronger, Smoother Fairings:** Enhances fairing compounds with superior strength and abrasion resistance.
- • **Creamy Consistency, Perfect Finish:** Cures to a stable off-white paste ideal for structural and cosmetic tasks.
- • **Seamless WEST SYSTEM Compatibility:** Optimized for WEST SYSTEM epoxy resins without compromising cure or strength.

## Overview

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

## Description

Get On The Water

## 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 | #278,333 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #1,169 in Epoxy Adhesives |
| Brand Name | WEST SYSTEM |
| Colour | off-white |
| Compatible Material | Fibreglass |
| Container Type | Bottle |
| Customer Reviews | 4.9 4.9 out of 5 stars (90) 4.9 out of 5 stars |
| 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 |
| Unit Count | 5.5 Grams |
| Upc | 811343011505 783847056576 |
| 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  on Reviewed in the United Arab Emirates 5 December 2025*

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

### ⭐⭐⭐⭐⭐ Good quality product
*by  on Reviewed in the United States 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  on Reviewed in the United States 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.com.pa/products/526842393-west-system-406-7-colloidal-silica-epoxy-filler-5-5](https://www.desertcart.com.pa/products/526842393-west-system-406-7-colloidal-silica-epoxy-filler-5-5)

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*Product available on Desertcart Panama*
*Store origin: PA*
*Last updated: 2026-09-03*