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fiberglass crack repair

Bumpyroad
Explorer
Explorer
after cleaning my TT I found a small 7 " or so hairline vertical crack in the sidewall. since it is AZDEL not too concerned but want to do something about it. as it is in the middle of the side I plan on 1) drilling tiny holes at ends to keep it from spreading; 2) either use eternabond tape or a 3M 4200 adhesive/sealer 3) put a marine cleanout plate or speaker grille over the "patch".

any body have a better solution, other than spending mega thousands and have the side replaced? any fiberglass work less than that will certainly look worse than a plate over it.
my main question is whether eternabond or 4200 will be the better fix?
thanks
bumpy
10 REPLIES 10

Bumpyroad
Explorer
Explorer
thanks, I have a tube of 4200 so think I will just use that. I gather that the tape is thick then from your post?
found a short length of this: Eternabond Microsealant Tape on amazon?
may try it??
bumpy

Gjac
Explorer III
Explorer III
I would use the 3M 5200,4200, Marine Tex, gel coat or Geocel caulk, it will lay flatter than the Eternabond tape. When you drill your holes at either end of the crack I would put a small pick in there to see if the outer layer of FG is cracked through. I can't see why a FG crack would appear in a flat side other than when laminating the FG wall there was a butt splice in the outer layer and not an overlap. Gel coat cracks usually occur when the gel coat is put on too thick. Good luck with your repair.

Bumpyroad
Explorer
Explorer
this crack is in the middle of the "side" . I have no slide. I ordered the "access port cover" yesterday from Overton's and am now leaning towards drilling the two tiny holes at each end of crack ( I read here that that is recommended so the crack won't spread) and stick on a length of eternabond tape over the crack to keep out moisture. is the eternabond as "permanent" as the 3M sealant would be? it would be more flat and easier to cover than the sealant. again it is made with Azdel so I am not concerned with moisture/delamination etc.
it has been sitting for 2 years so don't know what could have initiated this crack other than perhaps something thrown up by a commercial lawn mower, etc.

thanks
bumpy

fourthclassC
Explorer
Explorer
Marine Tex is good for this type of repair. It can be tinted. Excellent hardness and adheasion

Gjac
Explorer III
Explorer III
It sounds like the crack is only in the gel coat and not through the FG laminate it self. If so I would leave it alone or put a decal over it if it bothers you. I agree with you, I would not do an extensive repair. Usually stress cracks in the gel coat show up in corners or radius of FG structures, yours is in the middle of the slide out. Is there any attachments on the inside that would induce a load in that area?

BarneyS
Explorer III
Explorer III
Moved to Tech Issues forum from DIY.
2004 Sunnybrook Titan 30FKS TT
Hensley "Arrow" 1400# hitch (Sold)
Not towing now.
Former tow vehicles were 2016 Ram 2500 CTD, 2002 Ford F250, 7.3 PSD, 1997 Ram 2500 5.9 gas engine

prichardson
Explorer
Explorer
Find a marine products store and get a gel coat repair kit. It comes with gel coat and assorted color additives so you can match the color of your unit.

kerrlakeRoo
Explorer
Explorer
Cant say which is better, my only thought was the syringe to get the product inside the wall if it had separated. Since there is no play across the crack I wouldn't think it would matter.

Bumpyroad
Explorer
Explorer
is epoxy a better seal than 4200?
there is no movement, can barely feel a crack with my fingernail rubbing across it.
bumpy

kerrlakeRoo
Explorer
Explorer
Bumpy, IF when you push on it you can see any movement in the sides of the crack you may want to get some epoxy, they sell a small syringe type of package that mixes in a tube and comes to a fine point. You could try to inject a drop or two of epoxy that way to stop movement at the top where the hole is drilled.