WEST SYSTEM 403 Microfibers Filler | High-Strength Structural Epoxy Wood Filler Additive for WEST SYSTEM® Epoxy | Marine and Exterior Epoxy Joint Filler | Made in the USA

Product Details

• Brand: West System
• Flavor: Unflavored
• Item Weight: 16 ounces
• Included Components: urea-resin-adhesives
• Number of Items: 1
• Unit Count: 20 Ounce
• Model Number: 403-28
• Manufacturer: WEST SYSTEM
• Warranty Description: LIMITED WARRANTY
• Age Range Description: Adult
• Item Form: Paste
• Item Nype Name: FILLER MICROFIBERS 20 OZ
• Manufacturer Part Number: 403-28
• Liquid Volume: 20 fluid ounces

About this item

• High-strength epoxy thickening filler – 403 Microfibers is a blend of fine fibers designed to thicken mixed WEST SYSTEM Epoxy resin and hardener into a strong, multi-purpose adhesive. It is commonly used for structural bonding, especially when joining wood components.
• Creates a gap-filling structural adhesive – When added to mixed epoxy, 403 forms a non-slumping adhesive that bridges gaps between parts while still wetting out and penetrating wood fibers for durable bonds.
• Adjustable consistency for different bonding tasks – The amount of filler added controls the viscosity of the epoxy mixture, allowing you to create both light adhesive blends and thicker bonding mixtures suited for joints and repairs.
• Compatible with multiple WEST SYSTEM epoxy systems – 403 Microfibers can be used to thicken any WEST SYSTEM epoxy, including 105 Resin-based systems, G/flex epoxy, and G/5 Five-Minute Adhesive.
• Consistent mixing for reliable results – For projects requiring multiple batches, measure the filler added to the first mixture and repeat the same ratios to maintain consistent viscosity and bonding performance.