Continental revosealant the end of the spare tyre for years continental tyre sealants have been replacing the spare tyre in many vehicles this technology has now been further enhanced to meet the specific requirements of use in bicycle tyres the ammonium and protein free revosealant provides reliable sealing for punctures and small cuts without chemically corroding the tyre or tube the versatile revosealant is not only useful for repairs but can also be used for preventative measure