OKO Original Truck & Bus 25L

A layer of liquid sealant coats the inner tyre surface. When a puncture happens, it is forced into the hole and forms a near-instant bond with the rubber, sealing the problem for the rest of the tyre's life.

Apply the sealant through the valve using the adjustable OKO drum pump, which dispenses OKO against tyre pressure of up to 60psi/4.1 bar. If higher pressures are required, then use a tyre inflator. Always apply the sealant to new or fresh tyres, for long-term protection and maximum effectiveness.

The effect is almost immediate, once the tyre has been reinflated. It needs to roll a little way so that the centripetal force forces the OKO into a consistent layer around the tyre tread.

The sealant is an aqueous glycol-based solution that is non-hazardous, non-flammable, and non-corrosive. It is free from latex rubber and is non-allergenic. OKO operates under ISO 9001, ISO 14001, and ISO 45001 certified management systems, ensuring robust quality, environmental, and occupational health and safety standards.

OKO Truck & Bus can help extend tyre life by at least 20% under normal operating conditions by maintaining consistent air pressure and reducing heat build-up caused by slow leaks. In typical long-haul applications, OKO Truck & Bus remains active for approximately 100,000–140,000 km (60,000–90,000 miles), depending on climate and operating conditions. If the tyre still has a legal tread depth at that stage, the product can be topped up to maintain an active liquid layer inside the casing.

The life of the tyre need not be reduced if there has been a puncture. It should behave in the same way as the other tyres.

Yes. OKO Truck & Bus is designed to permanently seal multiple punctures within the tread area. Only a small amount of sealant is required to seal each puncture, allowing continued protection throughout the tyre’s service life.

OKO Truck & Bus is not compatible with most “Direct” TPMS systems that use valve-mounted electronic pressure sensors with narrow air passages, as the sealant may obstruct these components. It is generally compatible with systems that use wheel-mounted or rim-mounted sensors that are not integrated into the valve assembly. If your vehicle is fitted with TPMS, we recommend confirming the system type before application.

Yes. OKO is typically installed with the tyre deflated and the tyre is then inflated normally after application. If any residual sealant is present in the valve stem, ensure it is clear before inflating to allow unrestricted airflow. Inflate the tyre to the manufacturer’s recommended pressure. When installing OKO, remove the valve core using a valve core remover (VCR), then reinstall it securely before reinflating the tyre.

OKO Original Truck & Bus is designed for use in tubeless on-road commercial vehicle tyres. It is not recommended for use in inner tubes in heavy-duty road applications. It is commonly used in commercial tyres fitted to wheels up to 22.5 inches in diameter.