That "Slime" seems to work pretty well, but I have been told it will rust the rims. About 5 years ago, a large landowner asked me to mow a couple of hundred acres I had cleared by mulching, 6 or 7 years before. It was totally overgrown with thorny Mesquite bushes/trees. They provided an all wheel drive, 100 + horsepower, New Holland tractor with a front loader, and a big batwing mower. I was instructed to mow anything the tractor would push over, if possible. Before we started, the ranch foreman bought four, 5 gal. buckets of Slime. He pumped a full bucket into each tire. I mowed for about 2 months, and never had one flat. I am pretty impressed with that stuff. Of course, I would hate to be the one who finally had to pull a tire off for repair. I bet that was a mess.
Jeff
Jeff