A puncture-proof tire contains an inner flexible membrane that expands if an object pierces through the tire, containing the puncture and preventing air from escaping. This membrane's design allows it to immediately react to foreign objects, moving with them as they pierce the tire to prevent a hole from forming between the outside and inside.
Puncture-proof tires are capable of withstanding large amounts of damage. Even if a foreign object penetrates inches into a puncture-proof tire, the tire does not allow air to escape. The integrity of a puncture-proof tire may be compromised if the tire is severely damaged or if a puncture occurs in an area where the membrane is not present, such as the sidewall of the tire.
Some puncture-proof tires do not possess moving membranes but are instead coated on the interior with a viscous substance that instantly fills punctures. This coating may be installed by professionals on normal tires and can be a cost-effective alternative to purchasing puncture-proof tires with membranes installed.
When a puncture-proof tire is pierced, the driver may not notice. Puncture-proof tires are designed to travel for long distances without needing repair, and a driver does not need to seek immediate assistance and repair unless the tire damage is severe.