A flat tire can slow down anything. On the side of the road, it can make you late for an important meeting -- or worse, cause injury. A flat tire on a wheelbarrow can slow your work in the garden. Repairing a tubeless tire on a wheelbarrow is much like repairing a tire on a car or truck. Doing it yourself can save time and money.
Inflate the tire to the recommended air pressure. This usually is about 20 psi on regular wheelbarrows.
Cover the tire with soapy water, using the sponge, to locate the leak or puncture. The leak or puncture will cause the soapy water to bubble as the air leaks out.
Remove any objects from the leak or puncture, using the pliers. Nails or screws left laying around cause most punctures.
Insert the reamer tool into the puncture hole. This will open the hole up so the plug can be inserted in the hole. The reamer either has twists like a drill bit or a rough surface along the shaft of the tool. This will also rough up the hole so the plug can adhere to the puncture.
Insert a plug into the end of the insertion tool. The insertion tool has a large eye on the end like a sewing needle. The plug may need to be rolled to a smaller size to be inserted in the tool; do this with your fingers. Make sure the plug is centered in the insertion tool, equal amounts on both sides of the tool.
Coat the plug with rubber cement. This will give the plug extra sealing strength and make it hold in the hole better.
Insert the plug into the puncture with the insertion tool until 1/2 inch of plug is left on the outside of the tire. Pull the insertion tool out of the hole quickly. One quick jerk will release the plug from the insertion tool and then the tool can be removed.
Allow the cement to set up for 10 minutes. Cut the plug off even with the tire surface, using a razor knife.
Refill the tire with air and check for leaks.