Definition of Vulcanisation (Cold)

Repairs using the cold vulcanisation process are only permitted if the tyre has suffered superficial penetration damage in the tread area, and only if the damage does not extend beyond 6 mm measured on the inside of the tyre. The hole itself must be filled and the damage on the inside of the tyre sealed off. Inserting an inner tube without repairing the damage is not permitted. Sealing the damaged area by means of a puncture spray should only be regarded as a temporary measure in an emergency. (See Tyre Repairs)