I had a similar problem with pneumatic tires on my snow plow. I bought
cans of "fix a flat" at an auto parts store. About two cans managed to
plug the hole and fix the flat.

Dan wrote:
My apologies if this is off topic. I could not find a spot to put it.


My problem is as follows. Some time back, I had purchased a Big Red
Wagon from Northern tools. It has 4 pneumatic tires and good load
capacity. Over the years, It has served me well.

The problem is that one of the pneumatic tires has gone flat, but
without a puncture. This has happened once over the winter time, and
after many attempts at trying to reinflate the tire, I gave up. I
bought a brand new one for $25 USD, but it strikes me that there must
be some way to reinflate the tire. It must have been done when
manufactured!!

As it is, I have a tubeless tire with a a broad gap across the tire to
the rim -- I cannot determine a method to manipulate it so I can get the
air to stay in and for it to seal up against the hub. Anyone have an
idea? I would like to avoid buying a new tire again.

--dan