Hi there, the short answer is I don't know. I assume you mean the product that put in to the tyres before you get a puncture and it self seals under the air pressure if/when a puncture occurs? I've been using this for many years in my motorcycles and more recently in my cars. I have found a product on eBay / Amazon which appears to be pretty much the same, albeit much cheaper and it works just as well called "Goop". It's bright green, goes in through the tyres valve in the usual way. The only car I had any issue with it in was a Range Rover where it did appears to unbalance the wheels at 70-75 mph, fine at all other speeds and no issues in any other car. Worked very well in the wheels on my Aero 8.
