Filling Screw and other small holes in fiberglass - Fiberglass RV


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Old 02-17-2016, 01:58 AM   #1
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Filling Screw and other small holes in fiberglass

What do you use to fill small screw holes in fiberglass?
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Old 02-17-2016, 03:53 AM   #2
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I used an epoxy putty called PC 11 when I did a door hinge repair. You can load it into a syringe and inject it into a hole. A couple hours later before it completely hardens, trim the excess with a putty knife. It works best if you can block the back of the hole. In my case I was able to clamp some scrap sheet metal there. I was happy with the results and so far they've held up. Raz
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Old 02-17-2016, 06:27 AM   #3
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Hi P. Raz,

I just read your reply and just out of interest and understanding...do you block the back of the hole just temporarily till epoxy sets up?

Let's say you don't have a hole that goes "all the way through to inside." I'm thinking about different awning application, getting rid of bag awning plastic supports near awning rail. I couldn't support the back of the hole in that case. Maybe insert a plastic anchor to help contain spread of product and keep finished work from sinking?

Just curious and thank you!

Wendy


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Old 02-17-2016, 07:59 AM   #4
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Quote:

I just read your reply and just out of interest and understanding...do you block the back of the hole just temporarily till epoxy sets up?
That correct. My holes went all the way through so blocking the back avoided wasting large amounts of epoxy and helped in filling the hole. Holes that don't go through won't require backing. Raz
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Old 02-17-2016, 08:04 AM   #5
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Here is another option, JB PlasticWeld, it is an epoxy putty that you kneed together with your fingers and press it into the hole. It is easy to work with, white in color and has worked very well for me.
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Old 02-17-2016, 10:44 AM   #6
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Here's another option. This stuff is real good. They even use it on boats below the water line. Here's a link to Amazon's site for it. It's also available at most Marine or boating supply places
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Old 02-17-2016, 11:01 AM   #7
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I removed the stinky slinky tube off the front and the spare tire of the back on my Scamp...so I too had some holes to fix. I used Marine/Plastic Fiberglass Repair. It's a two part putty, cut off a chunk and kneed until the colors combine...roll into a sausage and stuffed it in. It's sandable and paintable. The color doesn't match perfectly tho. I'm not sure anything would. Perhaps a tiny bit of spot paint would help. I bought it at Lowe's for less than $5. I also used it on a wood fence when the gate catch screws had stripped out.
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Old 02-17-2016, 11:53 AM   #8
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I had deep holes to fill so I went with the paste which allows for injection. For shallow holes any of the hand mix puttys should work fine and save the cost of the syringe.
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Old 02-17-2016, 12:24 PM   #9
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Quote:
Originally Posted by Ian G. View Post
Here is another option, JB PlasticWeld, it is an epoxy putty that you kneed together with your fingers and press it into the hole. It is easy to work with, white in color and has worked very well for me.


I have used the JB WaterWeld Epoxy Putty. Have found it works well! If filling a hole just make sure you wipe away any excess you may have spread around the outside surface around the hole before it sets up.

I have even used it to fill a couple of small holes on the trailers roof created when I removed an old TV antenna. Been 5 years on the wet coast and no leaks.

It states it dries in an off white but I have found its a pretty good match for an older white gelcoat finish.
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Old 02-18-2016, 04:12 AM   #10
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I have used Marine-Tex for years for those fixes on my boat. It is a strong epoxy based filled that comes in white, and has always been waterproof, and stands up very well in sun.


It is a little hard to find except at marine stores. I have also found it at Ace Hardware stores in most states.
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Old 02-18-2016, 06:04 AM   #11
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Ah yes rollable epoxy putty. Never thought of that and I've in fact used it before to repair vinyl siding. It is easy to use. I keep a little running list of notes on things I learn here, so just added all of this info. Thanks for sharing!


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Old 02-22-2016, 12:44 AM   #12
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Smile Hole Filler

Thanks to all for the suggestions.
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Old 02-22-2016, 01:33 AM   #13
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I used P. Raz's recommendation today, for the same application. I hasn't cured in a few hours yet, but I will see how it is tomorrow.
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Old 02-22-2016, 09:09 AM   #14
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bondo works very well because the resin in the Bondo is the same as what your trailer is made of, I would suggest the type with the short strand fiber glass reinforcement . It's sandable and paintable
Ken
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