How to fix a pinhole leak in spa shell?

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6010fd12

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Mar 21, 2015
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I have a 2013 Jetsetter and while dremeling out one of the old jets, the cutoff disk must have slightly touched the shell and now there is a very small less than a 1/4 inch crack in the shell by the jet.

What is the best method to patch this up?
Here is a video of the leak.

20220801_183852.jpg20220801_183951.jpg
 
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Since that is on the back of the tub go buy the Water Weld at HD. I used it to fix a cracked pipe in my hot tub and it worked great, The only thing is since it is a straight piece of fiberglass it may not stick very well but for $7 its worth a try.
 
VinnyinNJ said:
Since that is on the back of the tub go buy the Water Weld at HD. I used it to fix a cracked pipe in my hot tub and it worked great, The only thing is since it is a straight piece of fiberglass it may not stick very well but for $7 its worth a try.
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Are you sure the water weld won't erode away with all the harsh chemicals?

Also here is a better picture of the damage.
20220801_183852.jpg20220801_183951.jpg
 
wireform said:
I'd repair obviously from the back and also would use a smidge on the finger and press some into it from the top side after the underside is cured, also scraping it by with a straight edge like credit card so it'll be completely level.
Click to expand...
In your opinion which do you think works better? Loctite or JBWeld? Also is there any prep I need to preform on the outside surface before applying it? Sanding, cleaning, etc.?
As for the front should I try to push/hammer in the crack so that it's flush with the shell before applying the epoxy? Currently it's slightly raised to where you can catch on to the edge with your finger. (see picture, you might have to zoom in a lot)

20220801_183852.jpg
 
I'd be very careful applying hammering /pushing as you see there's also a crack going towards the jet. If its very so slightly raised I may forgo messing with it and creating a bigger problem. I'd prep it from the back with a very light sanding just to remove the shine for best adherence. I've never used JB weld but the marine epoxy i have many many times with great success. You can also use short pieces of solid bare copper wire inbeded in the epoxy for extra rigidity across the crack and apply it really thick. It doesn't need to be pretty but rather strong.
 

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wireform said:
I'd be very careful applying hammering /pushing as you see there's also a crack going towards the jet. If its very so slightly raised I may forgo messing with it and creating a bigger problem. I'd prep it from the back with a very light sanding just to remove the shine for best adherence. I've never used JB weld but the marine epoxy i have many many times with great success. You can also use short pieces of solid bare copper wire inbeded in the epoxy for extra rigidity across the crack and apply it really thick. It doesn't need to be pretty but rather strong.
Click to expand...
Gotcha. Thank you. Gonna try the loctite one and see if that helps.

Also could I get your thoughts on which liquid leak seal you would reccomend that I use to circulate in the spa just in case I missed any other invisible or pinhole leaks? There is no other visible leaking but I just want to make sure since it appears that this tub had freeze damage that the manifold or a coupling may drip slowly without my knowledge. Thanks.
 
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