Glueing fiber-glass - RCCanada - Canada Radio Controlled Hobby Forum
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Old 08-07-2005, 09:24 PM   #1
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Glueing fiber-glass

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I had a mishap with a float plane today and blew the seams on the front 25% of my glass floats... They are Sea-Commander ones and have a 1/2" seam I can glue to (fiber-glass to fiber-glass) to repair them... So what it the best stuff to use... I have a Industrial Plastics store here so I can get pretty much any thing.. I was thinking of useing a cold-cure , 30 min or 5 min e epoxy... (only because I have some)... But what about polyurathane glue??? Or is there something better!!!! Here's a pic of the float and one of the "Start of the 'Rebuild'".. O well it could be worse..
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Old 08-08-2005, 07:46 AM   #2
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polyurethane is wonderful stuff;
use maskinging tape to wrap float to prevent expansion of the joint
wipe off excess expanding foam or you will have to sand it off;
good luck
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Old 08-11-2005, 07:37 PM   #3
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Hmmm that looks like a Fairchild F-11 Husky fuse.
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Old 08-12-2005, 04:58 AM   #4
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In the Marine (boat) repair, we use Epoxy Resin, and re-apply fiberglass over it once it has cured and is sanded. Your float should not be any different.
Just take a rotary tool like the dremell, fine cutting wheel and clean all around the mating surfaces. (don't be afraid to dig in there) Then make resin mixture and aply as many coats as you need. Be sure to sand roughly with 150-200 sand paper between coats, using a dremell tool, not by hand as you will wear your arm out berore long.

get some long strand fiberglass in a small can ready to mix, and apply all over the worked area and feather to nothing at the ends, just use a piece of wax paper to press the fiberglass in place and don't remove the wax paper until you feel the heat from the fiberglass curing.
Once you removed the paper, you use a rasp file and shape to contour.

Voila. Now you let cure, and give it a final sanding wigh a block of sand paper, 200-250 grit.

Fixing fiberglass is not all hard, just make sureyou shape to contour (before it cures fully) otherwise you will have lots of sanding to do later.

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Old 08-12-2005, 07:41 AM   #5
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From the picture, it looks like those floats are Polyester Resin, so they should be repaired with the same material. Same process as mentioned above only I'd use the polyester resin available from Canadian tire or some other source. I haven't had much luck with using epoxy to stick polyester resin together. It does stick, but will pop off easilly if forced. Goop also does a good job of sticking to Polyester resin parts, of course it practically sticks to anything.....Gary
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Old 08-14-2005, 12:48 PM   #6
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Also had trouble getting epoxy to stick to polyester too. roughed it up and the whole bit. Goop holds much, much better.
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Old 08-15-2005, 09:46 AM   #7
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Yes that's a Husky. .. Had a engine stall, way out and couldn't here it die ( other planes flying at the float fly ).. Then went into a stall and PLOOP.. into the water.. From about 75'....
I tried polyurathane on the joints and it seemed to work great. then I cut a hatch in the top of the float and used 1 oz cloth and polyester resin on the inside over the damaged area... Now I just have to seal up the hatch and rebuild the float strut mounts on the fuse ....
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Old 08-17-2005, 11:15 AM   #8
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Are you terrorizing the whales again Darren???

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