--- 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: "$44.62" currency: USD in_stock: true reviews_count: 4 category: "West System" url: https://www.desertcart.us/products/626603776-west-system-403-microfibres-filler-160g-thickens-epoxy-for-wood store_origin: US region: United States of America --- # 100% waterproof durability High-strength gap filler Versatile multi-surface use 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:** $44.62 **Availability:** ✅ In Stock ## Summary > 🧰 Elevate your epoxy game—thicker, stronger, waterproof perfection! ## 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?** $44.62 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/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 - • **Precision Thickening:** Add just 4-16% by weight to epoxy for optimal viscosity—no more runny messes, just smooth application. - • **Superior Bonding Power:** Transforms epoxy into a tough, gap-filling adhesive that lasts through marine and outdoor challenges. - • **Trusted Industry Standard:** Favored by pros for consistent, durable results that elevate every DIY or professional project. - • **Waterproof & Weatherproof:** Ensures your repairs stay intact rain or shine, perfect for exterior and marine applications. - • **Multi-Material Compatibility:** Ideal for wood, fiberglass, and engineered materials—your all-in-one repair companion. ## Overview WEST SYSTEM 403 Microfibres Filler is a premium cellulose fiber powder designed to thicken two-part epoxy resin, enhancing gap-filling, strength, and waterproofing. Perfect for wood, marine, and fiberglass repairs, it boosts epoxy performance with a durable, weather-resistant bond. Trusted by professionals, it mixes easily at 4-16% by weight to deliver superior adhesion and lasting results in both interior and exterior applications. ## Description From the manufacturer Review: Good stuff - My go-to additive for West system epoxy for bonding Review: Stops it running - Industry standard for thickening epoxy resin ## 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 | | Best Sellers Rank | 14,384 in DIY & Tools ( See Top 100 in DIY & Tools ) 1,603 in Adhesives & Sealers | | Brand | West System | | Colour | Cures to an off-white colour. | | Compatible Material | Engineered Wood | | Container Type | Aerosol Can | | Customer Reviews | 4.6 out of 5 stars 18 Reviews | | Global Trade Identification Number | 05063369040303 | | Included Components | WEST SYSTEM® Microfibres Filler (160g) | | Item Form | Powder | | Item Package Quantity | 1 | | Item Type Name | Epoxy Filler | | Item form | Powder | | Manufacturer | Wessex Resins & Adhesives Ltd | | Manufacturer Part Number | 403-1 | | Material | Powder | | Model Number | 403-1 | | Other Special Features of the Product | Waterproof, Enhanced Strength, Durable | | Special feature | Waterproof, Enhanced Strength, Durable | | Specific Uses For Product | Woodworking | | Specific uses for product | Woodworking | | Unit Count | 1.0 count | | Viscosity Level | High | | Water Resistance Level | Waterproof | ## 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/61Dm-Nk15hL.jpg) ![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 2](https://m.media-amazon.com/images/I/81sJpLtkjiL.jpg) ![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 3](https://m.media-amazon.com/images/I/81ckFVTHNxL.jpg) ![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 4](https://m.media-amazon.com/images/I/812iwgbHzEL.jpg) ![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 5](https://m.media-amazon.com/images/I/81bwFqqJnVL.jpg) ## Available Options This product comes in different **Size, Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good stuff *by D***M on 2 February 2026* My go-to additive for West system epoxy for bonding ### ⭐⭐⭐⭐⭐ Stops it running *by M***E on 30 September 2025* Industry standard for thickening epoxy resin ### ⭐⭐⭐⭐⭐ 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/626603776-west-system-403-microfibres-filler-160g-thickens-epoxy-for-wood](https://www.desertcart.us/products/626603776-west-system-403-microfibres-filler-160g-thickens-epoxy-for-wood) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-08*