Tyre Sealant is unconditionally guaranteed to seal punctures of up to ¼" diameter in the tread area of a Tyre - instantly and permanently - while driving. Tyre Sealant is a preventive measure to use before you get a flat Tyre. It is a non-toxic non flammable formulation which is installed inside the Tyres and remains there for the life of the Tyre, additionally helping eliminate under-inflation. Properly inflated Tyres last 20 - 25% longer and provide extra fuel economy (under-inflated Tyres can add 10% to a car’s fuel costs).