I know this is odd question because it is related to wheelchairs (which at least have two wheels :) and use of sealant.
Anyway, my father in law use anti-decubitus cushion (similar to the one picture) in order to prevent wounds from prolonged sitting in his wheelchair. However, there are frequent punctures which are hard to fix. These cushions are also very expensive so he is trying to avoid buying new one (current one is just few months old).
Cushions comes with few self-adhesive patches but those can't be applied very well to narrow surfaces between cells. I've even tried to use bike tire repair kit (patches and glue) but glue doesn't stick to material from which cushion is made (some kind of coated rubber).
I was wondering if tire sealant can be used in this case? Are there any other products or advice how to solve this problem?
Any help is greatly appreciated.