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As you look around it’s stated that these ball are made of vinyl and kits are sold for them .
They may work .
If you do a search on them the compound used comes back as PVC :
Most stability balls are made of PVC (polyvinyl chloride, commonly called vinyl); very few are made of natural rubber.
To me PVC pipe is not vinyl the ball is BUT I am not a chemist so ???

If yours is natural rubber it will look and feel like a tire inner tube . Most are not .

I tried polyurethane glue - gorilla glue and Permatex Adhesive and Shoo Goo .
All failed to adhere . I was surprised that the Permatex did not work and more so at the Shoo Goo as I have used Shoo Goo on many things and this is my first failure . All three of these just peeled right off and i did give them 18 to 24 hr. in 80 degree heat in the barn to cure .

I really didn’t think it would work but I thought what the hell try it.
Plumbers glue for PVC pipe .

It worked . I did try a think coat the first time and maybe did not give it enough time to cure and it failed.

Use thin coats . I did have to come back with a second thin coat and it took that time .
I have had it under pressure for a couple days and bounced on it . The glue has not failed and Must expand to a point as i put it on when the ball was deflated . I really did not think it would work but here it is .