403 Microfibers

Adhesive Filler

403 Microfibers Adhesive Filler is a fine fiber blend. Use it to thicken epoxy blended resin/hardener and create a multi-purpose adhesive. Its most popular use is for bonding wood. Epoxy thickened with microfibers has good gap-filling qualities but will still do an excellent job of wetting-out/penetrating into wood fibers. You can blend it into any WEST SYSTEM® 105 Epoxy Resin®/200 Series Hardener combination, G/flex® 650, or G/5® Five-Minute Adhesive.

Designed for :

Wood Bonding
Adhesion
Gap Filling
Penetrating Wood Fibers

Pair With 105 System Filler Selection Guide Selection Guide FIND WHERE TO BUY see sds

PROJECT USES:

Thicken epoxy blended resin/hardener and create a multi-purpose adhesive for:

Marine
Boat Repair
Bonding
Coating
Wood Joints
Strip Planking

PRODUCT SPECIFICATIONS:

Color | Off-White
Cures to off-white color
Fine fiber powder

PRODUCT SIZES:

403-9 | 6 oz
403-28 | 20 oz
403-B | 20 lb

Filler Facts

QUICK LINKS Helpful Tips, Safety Guidelines, Manuals, and More:

Thickening

Modifying with fillers and additives makes WEST SYSTEM epoxy extremely versatile for a wide variety of bonding and coating applications. Epoxy can be thickened to the ideal consistency needed for a particular job. Epoxy thickened with adhesive (high-density) fillers strengthens structural bonds, bridges gaps, and fills voids. Epoxy thickened with fairing (low-density) fillers is easily sanded and shaped after it cures.

Bonding with Fillets

A fillet is a continuous bead of thickened epoxy mixture applied to the angle created between two parts. It increases the surface area of the bond and serves as a structural adhesive and brace. Because epoxy can be thickened with high-density fillers into a non-slumping consistency it can bridge large gaps in wood joints, without loss of strength, thus saving a great deal of time and labor otherwise needed to create a strong joint.

Using WEST SYSTEMFillers & Additives

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