---
product_id: 5397949
title: "West System 406-7 Colloidal Silica Epoxy Filler, 5.5 oz | Thickens Epoxy"
brand: "west system"
price: "414 Lei"
currency: RON
in_stock: true
category: "West System"
url: https://www.desertcart.ro/products/5397949-west-system-406-7-colloidal-silica-epoxy-filler-5-5
store_origin: RO
region: Romania
---

# Thickens epoxy for perfect viscosity 5.5 oz precise dosing Prevents runoff on vertical surfaces West System 406-7 Colloidal Silica Epoxy Filler, 5.5 oz | Thickens Epoxy

**Brand:** west system
**Price:** 414 Lei
**Availability:** ✅ In Stock

## Summary

> 🛠️ Elevate your epoxy game—thicker, stronger, 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?** 414 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/5397949-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.
- • **Creamy Off-White Finish:** Achieve a smooth, stable paste that blends seamlessly with your epoxy.
- • **Master Your Epoxy Viscosity:** Control thickness effortlessly for flawless application every time.
- • **Made for WEST SYSTEM Epoxies:** Optimized compatibility ensures no compromise on cure or strength.
- • **Boost Fairing Compound Strength:** Enhance durability and abrasion resistance where it counts.

## Overview

West System 406-7 Colloidal Silica is a premium 5.5 oz epoxy thickening additive designed to control viscosity, prevent runoff on challenging surfaces, and enhance the strength and consistency of fairing compounds. Made in the USA and fully compatible with WEST SYSTEM epoxy resins, it cures to a creamy off-white paste ideal for professional-grade structural and finishing applications.

## Description

West System 406-7 Colloidal Silica Epoxy Filler, 5.5 oz | Thickens Epoxy | Control epoxy viscosity for reliable gluing and coating results and easier application with this thickening additive.: Automotive Adhesives And Sealants: desertcart.com: Industrial & Scientific

## 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 | #39,451 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #53 in Tile Epoxy Adhesives |
| Brand | West System |
| Brand Name | West System |
| Color | off-white |
| Compatible Material | Fiberglass |
| Container Type | Can |
| Customer Reviews | 5.0 out of 5 stars 111 Reviews |
| Full Cure Time | 24 hours |
| Global Trade Identification Number | 00811343011505 |
| Included Components | FILLER COLLOIDAL SILICA 5.5 OZ |
| Item Form | Powder |
| Item Highlight | Control epoxy viscosity for reliable gluing and coating results and easier application with this thickening additive. |
| Item Package Quantity | 1 |
| Item Type Name | MARINE ACCESSORIES |
| Item Weight | 5.5 ounces |
| Manufacturer | WEST SYSTEM |
| Material | Resin |
| Material Type | Resin |
| Model | 406-7 |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Other Special Features of the Product | Controllable viscosity, Prevention of epoxy runoff, Improved strength and consistency of fairing compounds |
| Part Number | 406-7 |
| 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 |
| UPC | 811343011505 783847056576 |
| Unit Count | 5.5 Ounce |
| Viscosity Level | High |
| Volume | 5.5 fluid ounces |
| Warranty Description | Limited Warranty |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** West System
- **Color:** off-white
- **Item Form:** Liquid
- **Material:** Colloidal Silica

## 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)

## Available Options

This product comes in different **Size** options.

## 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.ro/products/5397949-west-system-406-7-colloidal-silica-epoxy-filler-5-5](https://www.desertcart.ro/products/5397949-west-system-406-7-colloidal-silica-epoxy-filler-5-5)

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-11-01*