OKO Light On Road Tyre Sealant Policy

OKO Light On Road Tyre Sealant

1 May 2021

OKO Global LLP, as Manufacturer of the OKO Light On Road grade of tyre sealant – formerly known as OKO Light Commercial Vehicle (LCV), makes the following statement to clarify the Company’s official policy concerning the recommended uses of this product.

Light On Road Grade is predominantly designed for use with light commercial vehicles (commercial pick-ups, vans, small to medium trucks etc.) and is also for use in the tyres of caravans, motorhomes, boat and horse trailers, etc.

In the above cases, it can be applied to new or fresh tyres as a preventative tyre sealant. If so used, all the tyres must be treated, including any spare tyre. Users or Installers must have the wheels professionally balanced and have the tracking correctly adjusted before applying OKO to the tyres. OKO should not be applied to worn tyres.

Accurate application of the same amount of sealant to each tyre (assuming that all wheels/tyres are identical) is essential.

The recommended dosage per tyre must be strictly followed: the recommendations can be found in the relevant section of the Dosage Calculator at oko.com, or on the label of the sealant.

Tyre Pressure Monitoring Systems (TPMS)

TPMS is generally of two types: Direct and Indirect.

Direct TPMS is where a special valve is used in each wheel – when there is loss of air pressure in one tyre, it sends an alert to the car’s system and a warning light illuminates. The special valves (especially those used in cars) mostly have narrow air holes that make conventional tyre sealants unable to enter, and/or blockage can result.

Indirect TPMS is where the car’s Antilock Braking System (ABS), which measures the speed of travel of each wheel, is used to send an alert when one wheel speeds up – this means that the diameter of the wheel/tyre has reduced due to air loss. Standard valves are used.

OKO Light On Road is not designed to operate with Direct TPMS. The system supplier must be approached for approval before attempting to use this sealant. OKO accepts no responsibility if the valve blocks or the system fails to operate due to the use of OKO sealant despite this warning.

Vehicles fitted with Indirect TPMS can be fitted with this product – subject to the exceptions below. Check with your manufacturer or dealer before using OKO.

Passenger Cars

Cars are unique in their characteristics – they are relatively lightweight, and they have small- diameter wheels/tyres which rotate very fast. These facts make the balancing and tracking of the wheels/tyres critical for smooth and safe running.

Adding any tyre sealant liquid to the tyres will tend to amplify pre-existing imbalance that the driver may have not noticed previously. This can lead to steering wheel vibration at slow speeds before the sealant warms up and coats the inside of the tyre evenly: but also, more importantly, there can be a vibration effect at a certain band of cruising speeds.

This is most common in low-profile sports tyres, which have stiff, short sidewalls that are less able to contribute to the damping effect of the suspension. For this reason OKO does not recommend the preventative use of its sealants in tyres with a profile of 40 or less.

It should also be noted that once sealant has been fitted, the wheels/tyres cannot later be balanced properly.

Car-based SUV and 4x4s are also affected by these issues, and we do not recommend preventative sealant application. Heavy-duty 4x4s (traditional Land Rover Defender, Toyota Land Cruiser, Jeep Wrangler etc.) will not normally suffer so much although the same precautions must be taken as are set out above.

For these reasons, OKO only recommends the use of this sealant to temporarily repair a puncture in one car tyre (or a tyre of one of the other vehicle types listed above). A 12V air compressor should be stored in the car, along with a bottle of OKO Light On Road, for this emergency use. After successful reinflation, drivers must drive at less than 50 mph/ 80 km/h to the nearest tyre bay. A flattened tyre has almost certainly suffered damage from even a short travel on its wheel rim. It will need professional examination and repair or replacement.

As explained above, OKO must not be applied, even as a repair method, to vehicles with Direct TPMS.

Other Vehicles with TPMS

The fitting of TPMS to new vehicles is becoming more widespread and it now includes some light to medium-weight commercials and other van-based vehicles. As noted above, check your vehicle’s specification before applying OKO.

OKO Global LLp takes no responsibility for the incorrect use of its products, in contravention of these instructions.

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