Self-sealing tires use a different approach. They contain an inner layer of sealant material along the tread. If a nail or other foreign object punctures the tire, the sealant layer closes the hole to prevent the air from escaping, and the tire stays inflated. Both run-flats and self-sealers are all about the tread.

How good are self-sealing tires?

If the tire is punctured, the sealant immediately fills the void, coating it and forming a permanent seal. This revolutionary innovation does away with your tire losing air, causing you to pull over and replace the tire with a spare. Self-sealing technology has been proven effective for sealing punctures.

How does self-sealing Tyres work?

How do self-sealing tyres work? ... If your tyre is damaged while you're on the road, this gel will immediately seep into the gap left behind. As such, you'll stop losing air pressure and be able to continue driving for many miles to come.