When a tyre is punctured, Ultra-Seal is forced against and around the puncturing object by the inner air pressure, thereby preventing air from escaping. If the puncturing object is thrown out of the tyre by centrifugal force or is pulled out, the air on the inside forces Ultra-Seal into the wound and immediately stops air loss. Special fibres entwine, forming a clot, then as the rubber recovers, aided by the flexing of the rotating tyre, the inner air pressure forces the clot well into and through the wound.
Once Ultra-Seal is exposed to outside air, a unique curing process begins. The repair extends well into and through the wound and once cured, provides a repair that is impervious to water (rain, snow, mud, etc.). The cured repair is then transposed into a positive rubberised seal, thereby protecting the inner casing and steel belts by preventing outside contaminants from leaching into the wound.
People often ask ‘If Ultra-Seal cures from exposure to outside air, then why does it not cure by the air inside of the tyre?’ As the vehicle is driven and the temperature of the tyre increases, a portion of Ultra-Seal’s liquid base evaporates within the tyres inner air cavity. As the tyre cools, the vaporised liquid condensates back into the formula. The inside air actually becomes part of the Ultra-Seal system.
The sealed air chamber prevents outside air from entering or inside air from escaping. Constant resetting of air pressure is not required. Tyres and air pressure can be adjusted with much longer intervals than those called for in standard Preventative Maintenance (PM) programmes.
How much Ultra-Seal is needed?
The correct amount of Ultra-Seal for vehicles travelling at highway speed has been scientifically calculated to provide the proper coating to the inner surface of the tyre-rim, allowing for absorption into the casing, while still maintaining a reserve. The correct amount can be found either by using the dosage calculator or the dosage chart.
The reserve (approximately 20% of the inserted amount) is extra Ultra-Seal that will shift and move. Only the reserve will settle to the bottom of the tyre when the vehicle stops. The reserve constantly redistributes as the tyre rotates, thereby continually providing an even coating. Each time a puncture occurs, a small amount of reserve is used.