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West 403 Microfibers are a fine fiber blend used as a thickening additive with resin and hardener to create a multi-purpose adhesive especially suited for bonding wood. Epoxy thickened with microfibers has good gap-filling qualities while retaining excellent wetting/penetrating capability. Color: off-white.
$10.98
$25.63
$217.57
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BRAND:
WEST System
Type:
Fillers
Usage:
Bonding
Questions & Answers about WEST System 403 Microfibers Adhesive Filler:
2013-04-10A shopper asked: I bought the WEST 105 and 206 hardener. Need to make a "Peanut Butter" sauce to bond my new plywood floor to the side hull. What third agent should I buy? So many to choose from WEST! Please help!
+Expand Answers
2013-04-11BRIAN CRAIG: I have used both 403 and 406 fillers and personally prefer the 406 colloidal silica for making smooth peanut butter. It is easy to mix and work. The only qualifier is that the finished surface is harder to sand than micofibers, but this may not be an issue in your case. Without knowing whether the joint is exposed and what potential flexing there might be it is hard to advise on the detail. 406 and west epoxy will likely be stronger than whatever they are connecting to. Good luck!
2013-04-11MIKE BOSTIC: I used 403 filler for general thickening. If The epoxy was going to show like on an edge and a didn't w abt to sand (i don't like sanding) and wanted a very "fine" rdge, I used 404 filler.
2013-04-12KEN LEDONNE: 406 colidial silica and 403 micro fibers mixed together. It will be strong and spread smooth. 403 by itself clumps.
2013-04-12JEFF HUFFENBERGER: I actually prefer 406 for this purpose. 403 will work, but tends not to give as smooth a fillet as 403. You really need to use a lot of either additive, especially 406, to prevent sag. The other option, although much more expensive, is to use West's Six10. This is premixed, and because you are using a caulk gun, it lays on a fillet very smoothly and evenly. The price is much, much more than mixing your own, however.
2013-04-13CHARLES ROSS: The 403 filler is good for that. Essentially hardened resin is very brittle. Adding a fiber acts to stop if cracking. So a microfiber filler is used when strength is needed. Microbaloons are used when no strength is needed, such a fairing or fillers. Reading Gougeons Bros book on the subject would be well worth it if this a large project.
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