West System 403 Microfibers Adhesive Fillers (6oz)


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West System 403 Microfibers Adhesive Fillers (6oz)

  • West System 403 Microfibers Adhesive Fillers (6oz)

From The Wavelength Blog Read more

West System 403 Microfibers Adhesive Fillers (6oz)

403 Microfibers, a fine fiber blend, is used as a thickening additive with resin/hardener that builds volume quickly and blends easily to create a multi-purpose adhesive, especially for bonding wood. Epoxy thickened with microfibers has good gap-filling qualities while retaining excellent wetting/penetrating capability. Cures to an off-white color.

WEST SYSTEM Epoxy fillers are used to thicken the basic epoxy resin/hardener mixture for specific applications. Each epoxy filler possesses a unique set of physical characteristics, but they can generally be categorized as either Adhesive (high-density) for bonding applications or Fairing (low-density) for sanding and fairing applications. 403 Microfibers are right in the middle.

Adding these filling agents to blended epoxy resin and hardener allows you to control the consistency of the epoxy, bridge gaps in joints, create either strong or sandable fillets with epoxy, or alter the cured density of epoxy making it easier to sand smooth.

General Purpose Adhesive

The West System 403-9 Microfibers Adhesive Fillers (6oz) are a thickening additive that blends easily with WEST SYSTEM Epoxy to create a general purpose adhesive with high strength and excellent gap filling qualities. Thick mixtures maintain good surface penetrating ability for bonding wood and other porous surfaces.

Filler Buying Guide

Quantity of mixed epoxy required for consistency:

  • Epoxy filled to catsup consistency: 3.8 qt
  • Epoxy filled to mayonnaise consistency: 2.5 qt
  • Epoxy filled to peanut butter consistency: 1.0 qt


Size6 Oz
Pack SizeSingle Pack

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