I was hoping this product would fit my 22psi self-propelled lawnmower tires. I removed the stem with the provided cap tool, squirted in half a bottle and re-inflated the tire with my compressor and I could hear the air coming out. I used the rest of the bottle to no avail, I could still hear the air coming out. Then I added the final step to the instructions on the bottle, I ran the mower about 200 yards/meters around the yard and it worked. The hole is closed. I checked the PSI the next day and it was 19.5 so it's still leaking slowly and needs fixing but the slime helped me mow 1 acre of yard without having to remove a tire as recommended.