Plugs work pretty well and most auto parts stores carry lots of tire repair kits.
You may want to contact Kumho and describe the location of the puncture. See what they say re: the viability of plugging the tire.
A lot depends on the construction of the tire and its radial belts. There are a bunch of ways the sidewall and tread belts interact and are connected. It may be OK to plug these based on their construction and / or the location of the puncture.
It sounds like Canadian Tire is using a blanket CYA policy.
Good Luck!
You may want to contact Kumho and describe the location of the puncture. See what they say re: the viability of plugging the tire.
A lot depends on the construction of the tire and its radial belts. There are a bunch of ways the sidewall and tread belts interact and are connected. It may be OK to plug these based on their construction and / or the location of the puncture.
It sounds like Canadian Tire is using a blanket CYA policy.
Good Luck!