Step 1: Separate the flat inner tube from the tire.
Step 2: Attach the tube to the bike pump.
Step 3: Pump up the tire till it’s full.
Step 4: Listen for the noise of air escaping of the tube. Bring it near to your ear to help.
Step 5: Cover the hole with a thumb, detach the pump, and let all the air out the tube by pushing down on the valve stem.
Step 6: Use a sandpaper and lightly sand a zone around the leak bigger than the patch.
Step 7: The leak area must be wiped clean.
Step 8: Cover the sanded zone with glue.
Step 9: Let the glue to dry for about five minutes.
Step 10: Separate the patch from the backing and place it directly onto the tube, squeezing it firmly into the glue.
Step 11: Remove the cellophane cover from the patch, and that’s it.