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Tractor Talk Discussion Forum

O/T Fiber glass bath tub repair????????/

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old

08-30-2007 12:17:01




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Hove any of you ever tried to repair a fiber glass tub. The one in my house has cracked and the crack is about 18 inches long. So have any of you ever tird to do this and did it work?? What did you use to do it?? I would replace it but at this time theres no money in the kitty to do so, so I have to try to fix what I have. My thinking is to pull the tub out, which I have to do to repair the floor any how. Then get some firer glass stuff for an auto parts store and put 2 or 3 layer of it on the under side of the tub. Then when I set if back in fill in under it with that spray in foam so it sits on the fom not in the air like it does right now. I figure if I do that it will not flex as much and maybe not crack again. What do you guy think??
Thanks

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Dan in Houston

08-31-2007 01:01:32




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 Re: O/T Fiber glass bath tub repair????????/ in reply to old, 08-30-2007 12:17:01  
Had the same problem. I found a lady that specializes in repairs - she works for all of the budget motels in the area and has a full time job. She could patch small cracks or if it was too bad, she had a whole bottom kit that she could glass in. If you time is work anything, this is the cheaper way to go. Call around the local motels and chances are they have someone who does this.



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old

08-31-2007 07:45:21




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 Re: O/T Fiber glass bath tub repair????????/ in reply to Dan in Houston, 08-31-2007 01:01:32  
I'm retired so my time isn't worth much. I have all the time in the world so to speak



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HENRY E NC

08-30-2007 18:00:19




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 Re: O/T Fiber glass bath tub repair????????/ in reply to old, 08-30-2007 12:17:01  
My maintenance company repaired several hundred fiber glass tubs that were improperly installed and I did almost exactly what you are planning to do with a few exceptions. Drilled several large holes in the bottom of the tub abd filled under the tub with superexpanding urethane foam Could always tell when the foam was enough because it came out the crack. The sand the tub bottom real good with some 80=100 grit, wash it out with acetone and fiberglass away. You can use two layers of may at one time.

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Vito

08-30-2007 17:22:49




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 Re: O/T Fiber glass bath tub repair????????/ in reply to old, 08-30-2007 12:17:01  
Rich,
Try some fiber strand filler they are selling these days @ the auto supply stores.If you are fixing from the back it will be no problem.I filled some pretty big holes with the stuff.After repairs put some gell coat on the front side.Hope this helps.

Vito



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Vern-MI

08-30-2007 17:03:38




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 Re: O/T Fiber glass bath tub repair????????/ in reply to old, 08-30-2007 12:17:01  
Try the fiberglass shower pan inlay repair kit that covers the entire bottom of the shower. It adds a layer to the floor on the top side.



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old

08-30-2007 18:02:15




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 Re: O/T Fiber glass bath tub repair????????/ in reply to Vern-MI, 08-30-2007 17:03:38  
That would be nice but for twice that I could have a brand new tub and either way I don't have the $$ to do so. As it is I have to replace the whole bathroom floor which will be around $100 for the plywood.



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mjbrown

08-30-2007 15:58:09




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 Re: O/T Fiber glass bath tub repair????????/ in reply to old, 08-30-2007 12:17:01  
Use glass cloth and epoxy resin on the back side. Epoxy adheres much better than the polyester that you get at the auto parts store. It's available at marine stores or online from WEST System. I would super glue the crack first because the super glue is thin and will wick into the crack and the broken fibers better than the resin. As said below mortar under the tub is the way the pros do it (the good ones anyway).
Those tubs are made with chopper guns that shoot resin and chopped fibers onto the mold. Too much resin and not enough long fibers for good strength. Quick and cheap though.

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HENRY E NC

08-30-2007 18:09:14




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 Re: O/T Fiber glass bath tub repair????????/ in reply to mjbrown, 08-30-2007 15:58:09  
Epoxy resin is very expensive and once used can never be patched with vynl resin. Epoxy is waterproof but so is vynl resin unliess you leave water in the tub for 12 month. All gel coat is made of polyestervynl resin and color and is very pourous. Use the car stuff it will work just as easy ( Also did work on some large 50- 65 foot boat bottoms with blisters so I know from whence I came.)



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mjbrown

08-31-2007 06:26:55




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 Re: O/T Fiber glass bath tub repair????????/ in reply to HENRY E NC, 08-30-2007 18:09:14  
My full time job is repair of racing shells and oars. Epoxy is the best repair resin and it can be thickened with filler if needed. It is expensive but so is doing it over and the cost of fixing the floor underneath the tub would make it cheaper in the long run. Gel coat is for the cosmetic portion of the repair. I would use marine paint but gel coat is an option.



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old

08-30-2007 16:30:16




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 Re: O/T Fiber glass bath tub repair????????/ in reply to mjbrown, 08-30-2007 15:58:09  
Motor would be nice but sine this is a mobile home probably way to heavy for the 2X6s and the frame to hold up. This tub is on the outer wall area of the mobile home so theres not a lot of support there



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omahagreg

08-30-2007 15:03:14




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 Re: O/T Fiber glass bath tub repair????????/ in reply to old, 08-30-2007 12:17:01  
Old, in Omaha we have a guy that is all he does. I have heard he repaired a shower unit that had had a rafter punched thru it-he does it with it is place, from the finished side. I have seen his work, and you cannot see it! As I recall-since it has been awhile-it was not that expensive. Your easiest way to find a guy like that would be to call a plumbing wholesaler that sells fiberglass tubs. Greg

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Paul Shuler

08-30-2007 13:39:15




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 Re: O/T Fiber glass bath tub repair????????/ in reply to old, 08-30-2007 12:17:01  
Heck Old were in the Ozarks. Just find you an old wash tub and fill it up and let it sit in the sun for a while to take the chill off. You would fit right in with the rest of us hillbillys.
Paul



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old

08-30-2007 16:33:52




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 Re: O/T Fiber glass bath tub repair????????/ in reply to Paul Shuler, 08-30-2007 13:39:15  
LOL, I did that type of things years ago but I prefer the modern stuff now. Years ago I had a 55 gal. drum on a stand and would fill it with spring water, let the hot sun heat it up and then open the handle on a pipe and you had a show. Turn it off soap up and turn it back on. But that was back when I was 20 or so to old to do that now



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Walt Davies

08-30-2007 13:19:41




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 Re: O/T Fiber glass bath tub repair????????/ in reply to old, 08-30-2007 12:17:01  
Get a glass repair kit that has the cloth you need that for strength follow the instruction its real easy to apply be sure to sand the spot real clean. Yes the foam insulation spray will work very well to support the botton of the tub, the sides should be Ok but a little around the bottom edge won't hurt. Be sure to have help in putting the tub back in, spray the area then put the tub in before it hardened. Also you will need a Gel coat kit to repair the inside. Auto dealer or boat repair places have these. You need to get the gel coat so water won't seep though. also they have paint now that will make it look like a new tub.
Walt
PS loose some weight. giggle :)

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old

08-30-2007 13:33:25




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 Re: O/T Fiber glass bath tub repair????????/ in reply to Walt Davies, 08-30-2007 13:19:41  
Shoot if I lost some weight I would blow away in a strong wind. I stand 6 foot tall and around 150 LBS perfect weight for my build as per my doctor LOL



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glennster

08-30-2007 13:19:20




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 Re: O/T Fiber glass bath tub repair????????/ in reply to old, 08-30-2007 12:17:01  
bilding up the back side with matte or fiberglass cloth is the way to go. if you have a lot of air gaps under the tub and it lacks support. set the tub in mortar. outline the base of the tub with pencil on the floor so you know about where it sits. your may have a flange on the bottom that sits on the floor. mark that too. measure floor height to bottom of tub. when you are ready to set the tub, mix a stiff batch of mortar mix, mak 4-5 rows of mortar aout 6 inches apart the lenght of the tub itself, peak the rows so it kinda looks like a pyramid. when the tub is set on the mortar, it will compress down when you level it. then let the mortar set. it gives a sturdy base for the tub to set on.

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Patrick Martin

08-30-2007 12:29:04




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 Re: O/T Fiber glass bath tub repair????????/ in reply to old, 08-30-2007 12:17:01  
Pulling the tub and fixing it from the backside is the way to do it Old.

If it cracked from stress it might be a good idea to take the time now to reinforce the whole area.

If you have some scrap 1"X1"'s then use those, if not then save your cardboard paper towel tubes. You can cut them in half and lay fiberglass over them and they provide an excellent structure form. I did this on my speedboat that I restored a few years back and the nose cap is SOLID as a rock now and can be walked on.

If you just want a quick fix then JB weld works well for this on the inside of the tub. You can work it in and then lay a piece of wax paper down over it and smooth it out. After it cures you can peel it right off and paint!third party image

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Jack3424

08-30-2007 13:12:06




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 Re: O/T Fiber glass bath tub repair????????/ in reply to Patrick Martin, 08-30-2007 12:29:04  
I am amazed at the stuff I learn reading some of these posts! Thanks!



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supergrumpy

08-30-2007 12:45:49




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 Re: O/T Fiber glass bath tub repair????????/ in reply to Patrick Martin, 08-30-2007 12:29:04  
just filed that one away for future use

thank you.



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