There is currently a lot of hype around preventative tyre sealants in the marketplace. With each one claiming to be the best, Ultraseal is definitely the one with the best pedigree and track record. Being the original sealant of its type, developed and engineered longer than 40 years ago in America, it is still the sealant of choice in the U.S. and Europe. Worldwide testimonials are almost ad infinitum. For more information about Ultraseal you can visit their display stand at the Johannesburg Motor Show. The Johannesburg Motor Show is running from the 16th of October 2013 to the 27th of October 2013 at the Narec Expo Center in Johannesburg South Africa.


So what makes Ultraseal different and so successful?

Technology! Ultraseal was never meant to be a flash in the pan. From the onset it was meant to be the lasting solution to combat puncture problems in tyres – a goal achieved by means of continuous R&D over the last 40 years.

Sealants have caused many problems that Ultraseal have addressed. Using a highly evolved mixture of non-toxic and non-flammable chemicals, we have devised a product that is more than capable of working in harmony with today’s modern breed of vehicles. Ultraseal have included a patented thixotropic emulsion that bonds the molecules of the product together at speeds of up to 250km/h, thus allowing the driver complete flexibility.

Unlike other sealants that come and go on a regular basis, Ultraseal is not based on a latex and ammonia mixture, which damages and corrodes rims and casings. A latex and ammonia mixture will dry out and separate at some time, due to the characteristics of these two elements. Then when you need it the most, there is nothing to seal the tyre. Together with over 25 polymers Ultraseal contains only thin strands of coarse surface synthetic fibres that are stronger than steel when they interlock tightly together.

Ultraseal will positively repair small holes caused by puncturing objects up to 6mm in diameter, but only a hole that is in the tread area of the tyre, because there is no cord damage (rubber recovery), which constitutes 95% of today’s high speed punctures.

In the event of a bigger hole or a hole in a tyre sidewall and the Ultraseal fibres will simply bleed through the hole slowly, giving a controlled deflation, usually with a halt or abrupt slow down in air pressure loss at the lower pressures of 10 to 15 PSI (depending on the cord damage). This prevents damaged rims and also helps the driver maintain control and more than likely enabling continuation of the journey to remove the vehicle from a possibly dangerous location.

A single treatment of Ultraseal will:

  • Eliminate underinflated tyres
  • Provide additional fuel economy
  • Make tyres run cooler
  • Make tyres last longer
  • Eliminate most flats and blow outs
  • Preserves tyre casings
  • Ultraseal also guarantees that it:
  • Won’t rust or corrode rims
  • Won’t damage the tyre casings
  • Won’t harden and dry up into a ball

Ultraseal is not a “get you home” product. It is applied before the puncture occurs and permanently repairs puncture after puncture in the same tyre over and over. Once installed, Ultraseal not only repairs punctures, it conditions the inner casing, preventing porosity leaks caused by tiny holes and cracks. In other words, after installing Ultraseal the tyres maintain correct air pressure and the need to regularly top up with air or nitrogen is virtually eliminated. With correctly inflated tyres you get better fuel economy and your tyres will also run cooler, eliminating that killer problem of devastating heat build-up. Tyres treated with Ultraseal last up to 40% longer.

Ultraseal is guaranteed to seal porosity leaks, air migration and punctures up to 6mm in diameter within the tread area for the legal life of the tyre. If the tyre casing is damaged or weakened to the point of being unsafe, the Ultraseal has been designed to slowly bleed no matter how small the puncture is. Safety is a major concern of Ultraseal.

Johannesburg motor show


  • Current sealants on the market are latex based, with dissolved ammonia, water and a sawdust/rubber/paper fibre mixture as the main ingredients.
  • The latex congeals on contact with air to form a rubber plug. The water dilutes the latex, the ammonia keeps rot and fungus at bay (latex is a tree sap and is prone to rotting) while the rest help to plug the hole.
  • The water/ammonia mixture is slightly alkaline and this alkalinity keeps the latex suspended in the sealant.
  • With the addition of CO2, the liquid turns slightly acidic and can no longer contain the latex in solution. The latex then “crashes out” of the emulsion. Simply put, it doesn’t like acid water so it groups together and gets out of there as fast as possible. It is then that a latex ball is formed.
  • The remaining liquid still sloshes around inside the tyre, but is however simply a watery liquid with minimum, if any, sealing capability.
  • Latex in tyres dries out over time. The hotter it is, the quicker it dries. The thinner the sidewalls of the tyres, the quicker it dries.

Tyre Sealant

Contact Francois on 082 379 1904 or e-mail info@stsauto.co.za for more information. You can also visit their stand in Hall 9 at the Johannesburg, International Motor Show.