West System 40328 Microfibers, Off-White, 20 oz., 12/case
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WEST SYSTEM 40328 Microfibers is a fine fiber blend thickening additive that builds volume quickly and blends easily with epoxy to create a multi-purpose adhesive—especially for bonding wood. When mixed into epoxy, it provides strong gap-filling qualities while helping retain excellent wetting/penetrating capability, and it cures to an off-white color.
Key Features
- Fine fiber blend used as a thickening additive that builds volume quickly and blends easily
- Helps create a multi-purpose adhesive for bonding applications—especially wood bonding
- Epoxy thickened with microfibers offers good gap-filling while retaining wetting/penetrating capability
- Cures to an off-white color
Intended Use
- Bonding wood with WEST SYSTEM epoxy (when thickened with microfibers)
- General-purpose epoxy thickening for adhesive applications where gap-filling is helpful
- Epoxy fillets and filled adhesive applications where an off-white cured color is desired
Product Details
- Product name: WEST SYSTEM 40328 Microfibers, Off-White
- Net weight: 20 oz
- Case pack: 12/case
- SKU/Variant: 655-40328
- Use: Thickening additive to be blended into WEST SYSTEM epoxy to create a thickened adhesive/filler mixture
Parts Desk Insights
Best Use Case: Use microfibers when you want to thicken epoxy into an adhesive consistency that can bridge small gaps and still benefit from epoxy’s ability to wet and penetrate substrates.
Common Issues: For best results, keep your mix consistent—microfibers are added to reach the correct thickened “working” consistency. If the mixture seems too thin or won’t hold its shape, adjust by adding more filler gradually rather than adding liquid. Also confirm the cured color requirement if you’re matching an off-white finish.
Related Products & Accessories
- WEST SYSTEM 403 Microfibers (fine fiber blend) - If you’re looking for a different pack size, browse the WEST SYSTEM microfibers options in the same filler family.
- WEST SYSTEM Epoxy Resins & Hardeners - Microfibers are used to thicken epoxy—pair with the appropriate WEST SYSTEM resin/hardener combination shown in your project needs.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.