A tyre sealant designed to deal with On Road speeds in the tyres of heavy trucks, trailers and buses. Prevents punctures of up to 8mm diameter and stops tyre deflation as you drive: seals a hole in the tread area the moment the puncture happens. Copes with the friction and heat inside fast-moving tyres: reduces the temperature and lessens the loss of air. In a matched 5 month European test, the OKO Truck & Bus equipped truck had 20% less tyre wear then the non OKO truck. On the steer tyres, the difference was 40%. Lasts 100,000 - 140,000 km (60,000 - 90,000 miles) before more Truck & Bus should be injected (if the tyre is still usable) to maintain a liquid layer: the longer duration can be expected in cool climates.