All tyres must be inspected thoroughly before repair.Punctured tyres must be dis-mounted and inspected internally before any repair is carried out. Anti puncture sprays and plug repairs will temporarily plug small holes but they are only intended to get you to a tyre specialist, not as a long term repair solution.
A punctured tyre should be replaced if it displays any of the following symptoms.
- Damage from being driven flat
- Tyre sidewall penetrations or cuts / Perishing Deterioration of tyre rubber
- Wire casing is exposed
- Previous tyre repairs have failed
- Tread depth is below the legal wear limit (1.6mm)
If there is any doubt as to the safety of a repair the tyre should be replaced.