if
1. Buff the inside of the tire smooth, using a cleaner to remove any mold release
2. Use the patch with the center rubber hole filler with glue on it.
3. Then patch the tire you will never have a problem
if you do like most and patch on the dirty inside surface not using a tire buffer, and do not use the patch with the center piece then you results can vary significantly
Rod
1. Buff the inside of the tire smooth, using a cleaner to remove any mold release
2. Use the patch with the center rubber hole filler with glue on it.
3. Then patch the tire you will never have a problem
if you do like most and patch on the dirty inside surface not using a tire buffer, and do not use the patch with the center piece then you results can vary significantly
Rod