Tyre Sealants are designed to seal punctures from within. There are currently three different types of Sealants:
Typically these are ‘get you home’ products supplied in a pressurised aerosol can. The Sealant is injected under pressure from the can when the tyre has been punctured. The gas used to inject the Sealant also serves to inflate the tyre at the same time. This material solidifies inside the tyre and can only ever be considered a temporary repair subject to low speed limits. In addition the solidification of the Sealant within the tyre often results in semi-permanent contamination.
These are normally sold in plastic bottles and the contents are squeezed into the tyre when the tyre has been deflated before a puncture occurs. The Sealant remains liquid within the tyre but because it is water based may freeze and/or separate at low temperatures and cause severe imbalance problems.
The Glycol base makes it a very consistent sealant which will not freeze, separate or dry out under adverse conditions.