Earlier this year Goodyear introduced commercial tire technology, called DuraSeal, that repairs tire punctures. And it works, said Ross Petrini, Toronto's fleet maintenance operations manager.

Toronto ran a trial on the steering tires on five waste haulers. “The test tires were provided to us at no extra cost,” said Petrini. “During the first month of the trial we did not have a flat on the test tires. DuraSeal has saved us flat repair cost and downtime.” Petrini said the technology saves the city $80 (Canadian) per service call—plus the downtime of the truck.

The technology uses a gel-like, solvent-free compound build into the inner liner of the tire. Goodyear said DuraSeal is designed to consistently and instantly seal punctures up to ¼ inch in the tread area. “The tire casing maintains its sealing capability even after it is retread,” said Steve McClellan, vice president of commercial tire systems for Goodyear. “No other tire manufacturer offers tires with a built-in sealant.”

Petrini said DuraSeal is better than aftermarket sealing systems because they need to be re-installed when changing or rotating tires, “And the aftermarket systems are very messy,” said Petrini.

DuraSeal initially will be available in Unisteel G287 MSA and G288 MSA mixed-service tires, where punctures are a daily hazard. The company expects the technology to be useful in severe-service applications.