However, not all punctures are repairable, and in most cases the damage will need to assessed by one of our technicians to see if it falls in line with British Standards. To complement our convenient service, our technician will bring along a replacement tyre so that, if the tyre cannot be repaired, we can get it changed quickly and at no extra hassle to you.
It might be possible to repair a puncture if:
- the puncture is within the central three-quarters of the tyre
- the tyre's tread depth is over the legal minimum of 1.6mm
- there is no evidence of a previous repair where the puncture exists
- there is no side wall or shoulder damage to the tyre
- there is no run flat damage, which would affect the tyre’s structural make up
- there is no ageing or deterioration of the tyre rubber
Give one of our friendly advisors a call on 0800 433 4717 to discuss the damage and book your mobile puncture repair.
British standard BS AU159 sets out the rules for repairs to car tyres. It defines the type of damage that can be repaired and the way that repairs should be carried out.
“One of the most important requirements is that the car tyre has to be removed from the wheel to check for internal damage. If not spotted this could later result in sudden failure. Because of this, externally applied plugs and liquid sealants cannot be thought of as permanent repairs.”
These are injected through the valve as a preventative measure. The aim is to prevent air loss if a puncture does occur so that you can drive on without interruption. If the sealant works, then the seal will be pretty much instantaneous after puncture. However, this does raise concerns that you'll have no idea whether there's been a puncture or not. A large screw or nail in the tread will cause further damage over time and could lead to more catastrophic failure.
Experts recommend that you should check your tyres every time you use the vehicle if they contain a pre-puncture sealant. If the sealant has been activated you should see signs of the sealant (usually white latex-based) on the outside of the tyre. If there are any signs of this or of a penetrating object, then the tyre will have to be taken off the wheel rim and checked to see if it is suitable for a permanent repair.
These are used following a puncture. You inject the sealant through the valve and then use the compressor or cylinder of compressed gas to re-inflate. A can of sealant can bring peace of mind, but it’s important that you spot the puncture early and stop quickly.
Driving on a tyre in a partially or fully deflated condition will cause weakening of the structure and irreparable damage. Because a tyre has to be removed from the wheel and checked for internal damage before it can be repaired permanently, sealants cannot be considered permanent repairs.
Run flat technology
Although, in theory, it’s possible to fix a puncture on a run flat tyre, we have taken the decision not to extend our puncture repair service to this particular tyre technology. The reason is simple: it is impossible to assess exactly how much damage has been caused to the tyre and wheel, and not carrying out a repair is the only way we can guarantee driver safety.Run flat technology means that the tyre can resist the effects of deflation after sustaining a puncture, giving the driver enough time and mileage to get back home or to the garage. It's even more helpful given that not all modern vehicles contain a spare tyre as standard.
All run flat tyres come with recommended guidelines on how many miles or at what speed you can drive on them after sustaining a puncture, and if you exceed these guidelines then you will cause integral damage to the tyre. Unfortunately, as there is no way of us determining how far or how fast a vehicle has been driven since the puncture occurred, it would be impossible for us to know whether the strength and composition of your tyre has been damaged. Making a repair to a damaged tyre is a surefire way of diminishing tyre safety, which is something that we wouldn’t advise or want to profit from.
Your safety is our main priority, so we pride ourselves on delivering a cost-effective and proficient service. As such we would always advise you to purchase a new run flat tyre rather than repairing it.