Filling in holes in fiberglass

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PostPosted: Wed May 23, 2018 10:07 pm
I have 3 holes on each side of my camper shell that i want to fill in. Ive tried resin with chopped fiberglass but cant get it to work right. Should i use body filler that has fiberglass? The small holes are about .25” & bigger ones are about 3/8”.
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PostPosted: Wed May 23, 2018 10:22 pm
If that did not work I would suspect this shell could be an SMC piece. That means sheet molded compound. In that case there is a mold release right in the fiberglass itself. You have to use fillers that are rated for SMC and use a different base resin (usually epoxy based). Doesn't look like an area that has much flex so a short strand filler like USC's Duraglass would work there. It is rated for SMC as long as the area is not flexing. If I were fixing that I would make sure there is not any kind of paint in the area and rough up those holes for more surface area.
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PostPosted: Thu May 24, 2018 12:53 am
Its fiberglass not SMC, i guess the reason it wasnt working right cause the resin was too thick with fiberglass strans and wouldn’t lay in hole.

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PostPosted: Thu May 24, 2018 7:18 am
Upol Fiberal

grind a little around around the hole so it bites good
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PostPosted: Mon Jul 02, 2018 5:41 am
There are three main types of Resins Epoxy Resin, Vinylester Resin, & Polyester Resins. Each has different characteristics.
There is a lot to know when it comes to picking which one to use to repair what.
https://www.fibreglast.com/product/the- ... ing_Center
Besides that you probably have an old can of Resin that's out of its shelf life. Most Resins have a very short shelf life and your better off buying fresh from a reputable source and not at your local paint or auto parts store and defiantly not at Home depot or Walmart.

With that said I would do what Dave said
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