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Author Topic: Filling 6oz fiberglass weave  (Read 4409 times)

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bguff

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Filling 6oz fiberglass weave
« on: December 04, 2018, 09:52:20 PM »
Anyone have recommendations for filler to use when filling 6oz fiberglass weave?

I tried a two part bondo filler several years back, and remember sanding more/harder than i anticipated.  Might have been good amount of fumes as well, which i would like to avoid.

Leaning towards glass or phenolic balloons from us composites, but i have not tried any epoxy fillers yet.  Already have 635 epoxy resin/hardener.
Bob
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greylond

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Re: Filling 6oz fiberglass weave
« Reply #1 on: December 05, 2018, 04:59:52 AM »
Bondo is a polyester base rather than epoxy. I've had problems with it flaking off. I use glass microballoons in epoxy, easier to sand. My brother uses fumed silica (cab-o-sil) harder to sand. +1 for us composites! They have good prices and package smaller amounts for those of us who are'nt building entire sailboats.
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Doug Peterson Tripoli 15622 hpr cert. Lvl. 2

bguff

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Re: Filling 6oz fiberglass weave
« Reply #2 on: December 05, 2018, 10:24:43 PM »
Ordered quart each of 'Glass Bubbles' and 'Phenolic microballons' from US Composites.  Smallest size they had.   One of those should do the trick.
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bguff

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Re: Filling 6oz fiberglass weave
« Reply #3 on: December 17, 2018, 10:05:56 PM »
Do you take any precautions when sanding microballoons?  Dust mask, goggles, gloves, etc?  If dust mask, what kind of dust mask?
Just applied layer of phenolic balloons/spheres to 5.5" x 17" cone.
Bob
« Last Edit: December 17, 2018, 10:08:57 PM by bguff »
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