answer:I recently purchased a gallon container of green Slime Tire Sealant. $35–40. For the uninitiated, it is a goo that goes in tires to quickly seal leaks or plug pinholes – even rim leaks. It is great for off road SUV tires and tractor tires that might get punctured by roofing nails, or wood pallet edges, or metal angle iron posts or even shot with a 22. I fill my Tahoe 4×4 tires (aluminum rims) with it. I have used single use cans before and they are great but very expensive. The gallon comes with an internal pump . No matter how hard I tried, that pump did not work. I spent at least 15 minutes taking it apart, cleaning it and putting back together again. I put the whole pump in hot water and soaked it for 10 minutes and then it started to move. Finally the invisible clot broke free and the stuff pumped into the tire perfectly. On the container there is a disclaimer/warranty note that states if the pump does not work, do not bring it back to the store. Call a free 800 number and they will replace it. I fill my dual axle trailer tires with it too.