---
product_id: 626603776
title: "WEST SYSTEM 403 Microfibres Filler 160g - Thickens Epoxy for Wood, Marine & Fibreglass Repair - Waterproof, Multi Purpose Adhesive Powder for 2 Part Epoxy - for Interior & Exterior Use"
brand: "west system"
price: "€ 49.64"
currency: EUR
in_stock: true
reviews_count: 9
category: "West System"
url: https://www.desertcart.nl/products/626603776-west-system-403-microfibres-filler-160g-thickens-epoxy-for-wood
store_origin: NL
region: Netherlands
---

# Ideal for marine & outdoor weatherproof repairs Waterproof & high-strength durable filler 4%-16% mix ratio for perfect epoxy thickening WEST SYSTEM 403 Microfibres Filler 160g - Thickens Epoxy for Wood, Marine & Fibreglass Repair - Waterproof, Multi Purpose Adhesive Powder for 2 Part Epoxy - for Interior & Exterior Use

**Brand:** west system
**Price:** € 49.64
**Availability:** ✅ In Stock

## Summary

> 🛠️ Elevate your epoxy game—don’t let your repairs run downhill!

## Quick Answers

- **What is this?** WEST SYSTEM 403 Microfibres Filler 160g - Thickens Epoxy for Wood, Marine & Fibreglass Repair - Waterproof, Multi Purpose Adhesive Powder for 2 Part Epoxy - for Interior & Exterior Use by west system
- **How much does it cost?** € 49.64 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/626603776-west-system-403-microfibres-filler-160g-thickens-epoxy-for-wood)

## 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

- • **Marine-Grade Durability:** Waterproof formula ensures your fixes withstand harsh outdoor and saltwater conditions.
- • **Lightweight & Easy Mixing:** Microfibres blend seamlessly without adding bulk, giving you control and clean application.
- • **Trusted Industry Standard:** Highly rated by pros for reliable performance and superior bonding every time.
- • **Precision Thickening Power:** Transforms runny epoxy into a stiff, gap-filling powerhouse for flawless repairs.
- • **Versatile Multi-Surface Use:** Perfect for wood, fiberglass, and marine epoxy applications—one filler to rule them all.

## Overview

WEST SYSTEM 403 Microfibres Filler is a premium cellulose fibre powder designed to thicken two-part epoxy resin by 4% to 16% by weight. It enhances epoxy’s gap-filling ability and strength, delivering waterproof, durable bonds ideal for wood, marine, and fiberglass repairs. Lightweight and easy to mix, it’s the go-to additive for professionals seeking reliable, weatherproof adhesion in both interior and exterior applications.

## Description

WEST SYSTEM 403 Microfibres Filler 160g - Thickens Epoxy for Wood, Marine & Fibreglass Repair - Waterproof, Multi Purpose Adhesive Powder for 2 Part Epoxy - for Interior & Exterior Use : desertcart.co.uk: Business, Industry & Science

Review: Stops it running - Industry standard for thickening epoxy resin
Review: Makes 2 part epoxy nice and stiff... - I used this to make 2 part 5min epoxy "stiffer" so it would not run downhill when used in small quantities.. this stuff is very, very light weight and quite fly-away and to use 5% by weight is actually quite a lot, I guess I use about half that amount and the epoxy goes about 80% of where I need it to be but just so much better than raw epoxy so its worth the fuss of mixing it... Really unique product, like it a lot!!

## Features

- Epoxy Adhesive Filler: This Microfibres epoxy filler is a blend of cellulose cotton fibres, used as a thickening additive for bonding application. Epoxy thickened with microfibres provides excellent gap filling properties. Colour: off-white
- High Strength: A durable & waterproof filler that enhances epoxy resin, delivering superior bonding for marine epoxy resin, wood repair, and all-purpose filler applications
- Versatile Uses: Use with a 2 part epoxy resin kit to provide optimal curing as part of a fibreglass repair kit, for outdoor adhesive tasks, for wood repair filler, and marine epoxy filler applications. Add 4% to 16% by weight to the epoxy mix.
- Pair with Epoxy & Hardener: Combine this powder filler with your two-part epoxy and resin accessories for enhanced performance and versatility in all your repairs
- Waterproof Durability: This epoxy filler exterior solution ensures long-lasting, weatherproof adhesion, making it an essential component in marine epoxy resin and outdoor adhesive tasks

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CSK4763B |
| Batteries Required? | No |
| Best Sellers Rank | 12,551 in DIY & Tools ( See Top 100 in DIY & Tools ) 1,466 in Adhesives & Sealers |
| Colour | Cures to an off-white colour. |
| Customer Reviews | 4.5 4.5 out of 5 stars (42) |
| Date First Available | 19 Jan. 2024 |
| Included components | WEST SYSTEM® Microfibres Filler (160g) |
| Item Package Quantity | 1 |
| Item Weight | 240 g |
| Item model number | 403-1 |
| Manufacturer | Wessex Resins & Adhesives Ltd |
| Material | Powder |
| Package Dimensions | 16.7 x 10.3 x 10.2 cm; 240 g |
| Part number | 403-1 |
| Size | Small |
| Special Features | Waterproof, Enhanced Strength, Durable |
| Specific uses | Woodworking |
| Style | 403 Microfibres Filler |

## Product Details

- **Brand:** West System
- **Item form:** Powder
- **Material:** Powder
- **Special feature:** Waterproof, Enhanced Strength, Durable
- **Specific uses for product:** Woodworking

## Images

![WEST SYSTEM 403 Microfibres Filler 160g - Thickens Epoxy for Wood, Marine & Fibreglass Repair - Waterproof, Multi Purpose Adhesive Powder for 2 Part Epoxy - for Interior & Exterior Use - Image 1](https://m.media-amazon.com/images/I/71SLKgYJIUL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Stops it running
*by M***E on 30 September 2025*

Industry standard for thickening epoxy resin

### ⭐⭐⭐⭐⭐ Makes 2 part epoxy nice and stiff...
*by P***S on 20 March 2025*

I used this to make 2 part 5min epoxy "stiffer" so it would not run downhill when used in small quantities.. this stuff is very, very light weight and quite fly-away and to use 5% by weight is actually quite a lot, I guess I use about half that amount and the epoxy goes about 80% of where I need it to be but just so much better than raw epoxy so its worth the fuss of mixing it... Really unique product, like it a lot!!

### ⭐⭐⭐⭐⭐ good
*by A***R on 1 July 2025*

good

## Frequently Bought Together

- WEST SYSTEM 403 Microfibres Epoxy Filler 160g - Thickens Epoxy for Wood, Marine & Fibreglass Repair - Waterproof, Multi Purpose Adhesive Powder for 2 Part Epoxy - for Interior & Exterior Use
- WEST SYSTEM Epoxy Resin and Hardener - 105/205 A Pack - Marine Grade Epoxy for Wood, Metal & Fibreglass, Suitable for Outdoor Use, Furniture & DIY – Ideal for Polyester Surfaces & Gap Filling
- West system Pump Set 5:1 Ratio (301-5A), Resin, Multicolored

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-18*