Anti-puncture. Hi-Gear TIRE DOC. A product for preventing protection of tubed and tubeless tyres from punctures and for emergency repair of passenger cars and trucks gotten a flat. It comprises carbon fibers with the specific strength higher than that of steel and polymers used in body armours. It absorbs moisture, does not dry out inside the wheel and prevents wheel corrosion. One filling eliminates dozens of small punctures forever or 8 - 10 punctures with the diameter of 5 - 6 mm. The centrifugal force evenly distributes the compound while the wheel rotates. In case of a puncture, the product is squeezed out by air pressure through the hole and forms a strong elastic plug similar to wet rubber.