---
product_id: 394240413
title: "West System COLLOIDAL SILICA - 5.5 OZ"
brand: "west system"
price: "28.89 OMR"
currency: OMR
in_stock: true
reviews_count: 6
category: "West System"
url: https://www.desertcart.com.om/products/394240413-west-system-colloidal-silica-5-5-oz
store_origin: OM
region: Oman
---

# Precise viscosity control Prevents runoff on vertical surfaces Enhances epoxy strength West System COLLOIDAL SILICA - 5.5 OZ

**Brand:** west system
**Price:** 28.89 OMR
**Availability:** ✅ In Stock

## Summary

> 🛠️ Elevate your epoxy game—thicken, strengthen, and conquer every surface!

## Quick Answers

- **What is this?** West System COLLOIDAL SILICA - 5.5 OZ by west system
- **How much does it cost?** 28.89 OMR with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/394240413-west-system-colloidal-silica-5-5-oz)

## 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

- • **Built to Last:** Boosts abrasion resistance and structural integrity of your epoxy projects.
- • **Master Your Mix:** Achieve flawless epoxy consistency every time with ultra-fine colloidal silica.
- • **Seamless Finish:** Creates smooth, off-white mixtures ideal for bonding and filleting.
- • **Stay Put Formula:** No more drips or runs—perfect for vertical and overhead applications.
- • **Pro-Level Performance:** Trusted by craftsmen for superior control and durability in woodworking.

## Overview

West System Colloidal Silica (5.5 oz) is a high-performance epoxy thickening additive designed to control viscosity, prevent runoff on vertical and overhead joints, and enhance the strength and abrasion resistance of epoxy fairing compounds. It cures to an off-white color and is ideal for woodworking and fiberglass applications, delivering professional-grade results with water-resistant durability.

## 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | West System |
| Colour | Off-White |
| Item form | Liquid |
| Material | Epoxy Resin |
| Special features | Controllable viscosity, Prevention of epoxy runoff, Improved strength and consistency of fairing compounds Special features Controllable viscosity, Prevention of epoxy runoff, Improved strength and consistency of fairing compounds See more |
| Specific uses for product | Woodworking |

## Product Details

- **Brand:** West System
- **Item form:** Liquid
- **Material:** Epoxy Resin
- **Specific uses for product:** Woodworking

## Images

![West System COLLOIDAL SILICA - 5.5 OZ - 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.com.om/products/394240413-west-system-colloidal-silica-5-5-oz](https://www.desertcart.com.om/products/394240413-west-system-colloidal-silica-5-5-oz)

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*Product available on Desertcart Oman*
*Store origin: OM*
*Last updated: 2026-06-17*