Once you locate the puncture site, use a ballpoint pen to
draw a line with the puncture at the middle of the line.
Draw another line through the puncture so that you have an X
or a cross drawn on the tube with the puncture site where the
If you are going to use the little scraper that comes in the
patch kit, you are in for a long day. We bought this more
aggressive tool to prepare the surface of the tube. It works
faster and does a better job.
The tube has a slippery, mold-release chemical embedded in
the rubber. You must rough up the surface until the original
surface is completely roughed up with none of the smooth,
original surface showing.