Tire repair is a touchy subject in larger chains due to the aforementioned litigious nature of humans in America. The smaller guys risk it because it is a revenue source.
Tire plug kits commonly sold are only recommended for trailer tires and non highway use tires. Read the packaging.
Just think how one repairs a puncture with a plug. They stand over the tire at a 90 degree angle, stick the rasp in and clean the hole. Then stick, at a 90 degree angle again, the sticky plug in to the enlarged hole to block air from coming out.
BUT, chances are the item that created the hole (nail, screw, staple, etc ) more than likely did not go in at a 90 degree angle. So now, when the person sticks the rasp in to clean at a 90 degree angle, another hole is created and thus there is another channel for air and moisture to attack the steel cords and slowly rust out the steel belts in the tire. Over time, these rusted belt spots will weaken the tire and cause a possible tire failure.
This is why most tire manufacturers do not warranty any tires for workmanship and material defects if the tire has ANY repairs done to it.
Tire plug kits commonly sold are only recommended for trailer tires and non highway use tires. Read the packaging.
Just think how one repairs a puncture with a plug. They stand over the tire at a 90 degree angle, stick the rasp in and clean the hole. Then stick, at a 90 degree angle again, the sticky plug in to the enlarged hole to block air from coming out.
BUT, chances are the item that created the hole (nail, screw, staple, etc ) more than likely did not go in at a 90 degree angle. So now, when the person sticks the rasp in to clean at a 90 degree angle, another hole is created and thus there is another channel for air and moisture to attack the steel cords and slowly rust out the steel belts in the tire. Over time, these rusted belt spots will weaken the tire and cause a possible tire failure.
This is why most tire manufacturers do not warranty any tires for workmanship and material defects if the tire has ANY repairs done to it.