Indeed, if you have a flat tire on, a nail or a screw, this product is effective, only works on the TOP of the tire, provided that the hole is not too large, and well on the tire or even tearing 1cm, Tubless For tire. To perform the repair, remove course, the nail, or vis.Introduire lime to slightly expand the puncture, by the top of downward movements, remaining well perpendicular above the surface to be treated. Position the entire drill horizontally on the T-shaped tool by ensuring that it is at the center! good coat adhesive strand provides, firmly insert by pushing the T in the flat tire, push the tool so ay introduce all of the metal part, gently remove the tool upright! This step is important! because the wick will devise a kind of "cap" homogeneous inside, for a total sealing, then wait approx 30mins for the glue to dry, inflate your tires, if all the steps mentioned are respected, repair is almost definitive, ps: (Tourism in the tire pressure does not exceed approx 3B)