Holts Tyreweld is an emergency puncture repair in a can. Simply connect to the tyre valve and inflate to get you on your way again. Holts Tyreweld re-inflates in seconds with no jack required so eliminates the need for a tyre change.Useful in a variety of situations, travelling to and from events for trailers or simply as a daily companion, the water based formula in Tyreweld will not damage the tyre, and is easily washed out using warm water prior to any tyre repair.Tyreweld is approved by NTDA and Tyresafe.500ml suitable for tyres 16" and above.