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Distributor FAQ

Why should we choose OKO?

As the originator of preventative tyre sealants that really work, OKO is the longest-running brand in the market and has continued to develop its products. OKO now offers the biggest and most effective range of puncture prevention products in the World.

Who can become an OKO Distributor?

OKO seeks worldwide companies who are experts in supplying their vehicle market(s) and who are prepared to work hard to make a success of demonstrating, selling and delivering OKO puncture sealant to wholesalers, retailers and users.

Who carries out marketing and advertising?

OKO is a manufacturing company and we concentrate on giving Distributors the best possible price. Local advertising and promotion is the responsibility of each Distributor in their country. Support is available from OKO’s Marketing Department in the form of wording, artwork and printed literature. OKO also advertises continuously on Google Ads in all countries in which it has active distributors, and works continuously to optimise the leading positions of this website in search engines. We link directly to OKO pages in Distributor websites from our very popular ‘Find a Distributor’ web page.

Will you train us?

It is extremely important to OKO that our Distribution network offers a top-quality and consistent level of service. Therefore an OKO manager visits new Distributors to train their team on each aspect of how the product works, how to demonstrate, present, price, place and promote it, and how to support the customers.

What do we get from OKO?

OKO has assembled a package of Distributor Support Material that is second to none in the industry. This includes (in most major languages) brochures, stickers, posters, a dealer folder with data sheets and training material, application charts for all normal tyre types, PowerPoint presentations, photographs, a link to our website, reports of testing, safety data sheets, and of course packaging in various languages. You also get telephone and email support with any issues, queries or problems.

What is expected of our company?

If you are selected to be an OKO Distributor, you will need to pay upfront for at least your first few orders until you establish a credit record with us. You will need to satisfy us that you can order stock that will be sufficient to service your country’s customers without any break in supply. But above all, we expect your commitment to the OKO brand and to making it the number 1 tyre sealant in your region, sector or country.

We only cover a specialist niche. Can we be a Distributor?

OKO’s management recognises that specific market knowledge in certain sectors is very valuable. Thus we have specialist distributors who just handle, for example, Bike products or Motorbike products. In other cases we have companies who have a wider capability.

How do we apply?

Write to us using the application form. We will send you a list of questions and take it from there…

Consumers FAQ

How long has OKO Group manufactured an OKO Tyre sealant?

OKO have been tyre sealant suppliers for 42 years.

Can I use OKO in a TPMS-equipped vehicle?

Tyre sealant runs around the inside of the tyre tread. Thus in most instances it should not come into contact with an internal TPMS (Tyre Pressure Monitoring System) valve sensor when in use. However, when fitting OKO you may cause the sensor to be coated and thus affect its performance: in this case you may need to remove and clean the sensor. Some systems have small-bore valves that will not allow sealant to enter. OKO recommends that you consult your vehicle manufacturer to check whether their internal TPMS system is sealant-friendly before fitting anti-puncture sealant – and external TPMS systems that measure the speed of the wheel/tyre from outside are of course always OKO-compatible.

Does the use of OKO Tyre Sealant make a Tyre warranty void?

There is no legal reason under EU or USA law that should allow a Tyre manufacturer to say that their warranties are void due to the use of OKO Tyre Sealant, whether Off Road or On Road OKO. We hold copies of statements from major commercial tyre manufacturers stating that the fitting of tyre sealant does not void their warranties. Since the inception of OKO, there has been no report that OKO has caused a new tyre warranty rejection or a retread casing rejection. All OKO formulations are harmless to tyres and rubber and are compatible with rubber tyre components. It is possible that on rare occasions a retail tyre distributor may take a negative stance against OKO. This is likely to be due to a historic and cultural tradition of being “anti-sealant” or ignorance of the modern technological information provided by the OKO Group.

Does OKO extend effective tyre life by helping to maintain correct air pressures?

By using OKO, it is possible to combat porosity, which is a natural process of air migration through the tyre casing. By eliminating the possibility of driving on under-­inflated tyres, they will remain in effective service for longer periods. OKO will also tend to cool and condition the tyre rubber, retarding dry rot and casing degradation. These effects help to lengthen the life of the tubeless tyre casing. In a 5-month test in matched MAN trucks, an OKO fitted tractor unit had 20% less tyre wear than a non-OKO tractor across all tyres. In another test with temperature-monitored tyres on a heavy-duty forestry truck, the OKO-equipped tyres were on average 11.5% cooler than the matching non-OKO tyres. Heat is a leading cause of early tyre exhaustion.

Will using OKO prevent the retreading of the tyres?

No. OKO Puncture Free is compatible with retreading methods, both cold and hot cures. OKO does not have adverse effects on tyre casings or metal tyre cords. Tyre casings must be cleaned and dried prior to collection by the Retreading company or before delivery to them. OKO is retread-friendly, easy to clean with water and does not mask the punctures and holes sealed. It should be simple for “NDT” machines to find all the punctures sealed by OKO. OKO sealants have been formulated to be compatible with compounds used within a tyre. The R & D of OKO has been carried out in collaboration with leading scientific research bodies including“TARRC”, a leading Tyre & Rubber Research Institution (formerly M.R.P.R.A., a research institution owned jointly by The Malaysian & British Governments). OKO does not pose any hazards or flammability issues for the Retreading companies either.

Are OKO-fitted tyres likely to replace 'run flat' tyres?

Unlikely. “Run Flat” tyres are supplied by Tyre Manufacturers for specific new car models and may be considered useful for specific users who are willing to pay more for that particular tyre and special wheel, knowing the combination may only function correctly once.

OKO provides a permanent seal product that has a capability of sealing many holes on different occasions, on standard wheels and rims.

Are there any special maintenance requirements for tyres fitted with OKO?

No. As with any other tyres, drivers should check them regularly for cuts, penetration damage, and a loss of air pressure. Checks should be made at least twice a month, whether it is an Off Road tyre or On Road tyre.

Are there any additional environmental impacts when disposing of tyres fitted with OKO, compared to tyres without OKO?

No. Tyres with OKO can be disposed of via conventional recycling. OKO Group can recommend the methods required if there is a significant amount of OKO to disperse.

Why are there so many different types of OKO? Should I take care when choosing a grade?

OKO makes several formulations. Unlike many competitors, these are all genuinely different, having been designed and engineered especially for certain vehicle types. Any user of OKO can choose by using this site; or by examining the description on the labels of the bottles and drums.

Can OKO be used in tyres with inner tubes as well as tubeless tyres?

Yes – with exceptions. OKO will seal holes in the outer casing and in the inner tubes as well, but inner tubes are problematic. They can be unreliable and the wall thickness inconsistent. The inner tube can move inside the tyre. Inner tubes tend to rip when a puncturing object remains. You cannot inspect the tube.

OKO Off Road grades will function and seal holes without or with inner tubes (subject to lower limits in the case of tubes): but if the wheels and tyres permit it, the best combination for most Off & On Road users is to use a Tubeless wheel/tyre combination with OKO applied. This is the less expensive and better performing option for puncture free driving.

OKO On Road grades should be applied to tubeless tyres only, except for speed-limited mopeds/scooters which can use OKO X-Treme Dirt Bike.

Is the amount of OKO applied to any particular tyre size critical?

Yes. The amounts to be applied for any given tyre size are shown on the Dosage Calculator on this site; on product labels; and on the OKO application charts, as well as via your dealer/distributor.

Are there any special requirements in terms of health & safety?

Not especially, but common sense needs to be used. Avoid contact with the eyes; avoid prolonged skin contact with the sticky viscous layer inside the tyre; and do not drink the product. OKO can be removed from the skin with soaps and industrial hand cleaners. If OKO gets in the eyes, wash with copious amounts of clean water.

Why does the OKO product not block and seal a valve stem as if it were a hole when the tyre is deflated?

When a tyre is deflated on purpose for any reason, it is virtually guaranteed that the vehicle is standing still. When the tyre is motionless the OKO remains in place, coating the inside tread area of the tyre. It does not travel towards the valve stem. Insufficient air pressure and the lack of movement is enough to ensure the OKO remains in its correct place.

Will OKO swill inside the tyre and affect the valve stem causing a misreading of the tyre air pressure?

No. When applying the OKO product, some residue may remain inside the valve stem. This residue should be cleared by using an air-line as per the instructions. OKO tyre sealant coats the inside of the tyre. It will not travel back up the valve stem. Normally, conditions inside the tyre mean that no air is forced back through the valve stem out to the outside environment.

Will OKO stain my clothes?

If OKO splashes on clothes, it should be wiped off immediately, preferably with a wet cloth. If some OKO residue remains, wash the clothing that evening or during the same day. Avoid leaving the clothes for a long time with the OKO in a dry state. Contact with clothing should be avoided where possible.

What are 'ballasted' pneumatic tyres?

Tyres filled with water. Some rear Tractor tyres are ballasted by farmers to weigh down the vehicle. Or some pack rear tyres with weights or sand. Part-ballasting the tyre with OKO and using axle weights as needed is preferable (for the vehicle and the land) to using water or sand inside tyres; and the puncture problem would be eliminated too. (OKO cannot function inside a tyre that has been filled with water). For full information, see our Blog

Within what range of temperatures does OKO operate?

Depending on the formulation (determined by the climate of the country concerned and the formulation for that region) – 50 degrees C. to above + 45 degrees C. Both OKO Off Road and On Road grades have been used in vehicles in hot Desert conditions and in the northern Russian winter.
OKO Truck & Bus was tested in fast moving truck tyres over a 500 mile course starting at 6,000 feet above sea level and driving down to sea level. The trucks repeated the journey until 110,000 Km (68,750 miles) had been driven. Punctures suffered early during this test remained sealed throughout. The holes remained blocked by the permanent OKO seal. After 110,000 km, the product remained effective, sealing further punctures. OKO Truck & Bus remained inside the tyre in liquid form, positioned as designed, effectively coating and protecting the inner tread area of the tyres.  The inclusion of a special ingredient within the formulation kept the tyres cooler than normal.

Does OKO cause wheel imbalance?

OKO will not cause wheel imbalance in heavy vehicles if the product is dosed correctly. Any temptation to apply more than the recommended dose must be resisted. When applying On Road OKO to a Motorcycle or Car, the instructions should be strictly adhered to. Do not apply to low profile (45 or less) car tyres. Check that any in-valve TPMS system is able to accept sealant. Only the recommended quantity should be inserted, and to all tyres. Having applied the OKO, these vehicles should be driven carefully and slowly for a distance of 4 km (approx. 3 miles).

During this initial “run in” distance, OKO will line the inner tread area of the tyre. Once this inner coat has been formed, there should be no wheel imbalance. Any minor quantity acting as a reservoir by swirling around the tyre is not sufficient to cause wheel vibration. Any car wheels must be balanced and tracked professionally prior to fitting OKO. In some cases, where initial wheel vibration is experienced at certain speeds, the vehicle must be driven slowly until vibration disappears. OKO Off Road should NOT be fitted to fast moving On Road vehicles, or driven at a speed regularly exceeding 80 km/h (50 mph).

What happens to the OKO sealant in a tyre when a vehicle is garaged and idle for a week or two? Does it need to be driven again at reduced speeds?

Generally, once the OKO has coated the inner tyre, the majority of the OKO will remain as a coating. If an On Road light vehicle has been idle for a long period some minor wheel vibration may be detected when first starting off. This will disappear rapidly if the vehicle is driven steadily. This issue is NOT relevant to the use of Off Road OKO grades; OKO for Bicycles; or On Road OKO for Truck & Bus use.

Does OKO cause problems if it is necessary to make a vulcanised repair?

Due to the strength of the OKO seal, in normal conditions, it is unlikely that a conventional vulcanised repair is required. If necessary, OKO can be removed from the inside of the tyre by washing it out. The best method is by using a hose. The tyre can be dried. Then, a vulcanised repair can be applied, if necessary.

Up to what size puncture will OKO Puncture Free seal?

The OKO seal size varies with the type and grade of OKO used. Generally, the larger and thicker the tyre, the larger the hole that can be sealed. See the specific product pages for details.

Does OKO degrade, dry out or separate?

No. Any OKO product is formulated to remain in suspension. It remains ready to stop punctures, always. Sealants that require shaking before use are bad sealants: they will deliver uneven product, and are likely to fall out of suspension again inside the tyre.

How often does OKO need to be replaced inside a tyre?

Normally, not at all. OKO’s water-based sealants are designed in normal use to last the legal life of a tyre. In high-mileage on-road truck tyres it normally lasts for 62,000 miles + / 100,000 km + and the dosage may then need to be topped up: it depends on the conditions, whether new or remould tyres are used and how the vehicle is driven. OKO Magic Milk™, like all latex tubeless bike sealants, will dry out: but slower than others, and it dries evenly so it can be topped up without removing the tyre, until the tyre is worn out.

To what pressure does OKO seal?

OKO has sealed a Quad tyre at 2.5 PSI (0.15 bar). It has sealed a Truck tyre at 145 p.s.i. (10.0 bar). There is little practical limit on the high side.

How many holes will OKO seal using one application?

OKO is designed to seal many holes. It is the true “Multi-sealing” tyre puncture sealant. A small amount of OKO is used to seal a single hole in the tyre casing. Most of the tyre sealant remains and carries on working.

What should a driver do if a tyre is inspected and a nail is seen in the tread area?

According to UK Forensic studies, a nail can penetrate a tyre and on average will remain there for between 60 and 180 miles (96 to 290 km). The nail is likely to eject itself after this period. If OKO is inside the tyre, the vehicle is motionless, and the nail is noticed to be in the tread area:
i. The driver should pull the nail; then, ii. Drive immediately; this will cause OKO to make a new seal. If the nail is unnoticed and ejects itself, as the vehicle is in motion, OKO will make a new seal.

Can a number of punctures weaken the Tyre structures?

Tyre structures are likely to be weakened by sidewall and “Run Flat” damage. Using OKO will eliminate many if not all of the risks associated with “Run Flat damage” but OKO will not seal sidewall holes.

How strong is the OKO seal that blocks the holes and punctures?

OKO Group regards the seal to be a permanent seal due to its strength. When subjected to a “strength test” at the Gerotek Military Test Facility, OKO was compared to a “Repair plug” and a “vulcanised repair”. In this case, it was shown that the OKO permanent seal was 1.6 times stronger than a vulcanised repair and 7 times stronger than a “repair plug”. (The tyre industry states that a “Traditional repair” – defined as a vulcanised repair – is permanent. Therefore, the seal made by OKO On Road & Off Road, that is so much stronger, should be regarded by users and consumers as “more permanent still”).

What type of damage can OKO seal and repair?

OKO will seal holes in the tread area caused by nails, screws, glass, stones and sharp objects.

Does it contain any harmful ingredients?

The OKO Group uses its best endeavours to formulate products which are as environmentally friendly and as safe to use, store and dispose of as possible. All OKO formulations are audited by “Chemtox” (
No OKO product is classified as harmful, flammable or combustible, even under the latest worldwide chemical regulations. All are regarded as ‘non-hazardous’. They are all permitted for airline hold transport. MSDS sheets are available on request.

When the OKO liquid is inside the tyre, does it react with the air inside the tyre and go hard?

No. OKO remains liquid inside the tyre. It will seal a hole under pressure and then dry instantly, but it will not react with the air inside the tyre and turn hard.

To what speed is OKO On-Road Puncture Free speed-rated?

OKO On Road products have been tested at various speeds in a variety of vehicles.
Controlled tests have averaged between 100 & 120 mph (160 to 192 km/h). OKO has been tested satisfactorily in Motorcycles at speeds in excess of 185 mph (300 km/h) on Race Tracks. OKO On Road products are designed for use on the highway to a maximum of 130 km/h or any lower legal speed set by the authorities. DO NOT EXCEED YOUR LEGAL VEHICLE SPEED LIMIT.

Will OKO corrode the wheels, rust wheel rims or steel belts?

No. There are special corrosion inhibitors in the OKO sealant formulations that inhibit corrosion in steel & alloy rims. They will prevent the product from causing oxidation in brass valve stems. If any residue of OKO is touching the inner rim, it can be washed off when a tyre is changed. It is advisable NOT to use any tyre sealant with traditional chrome-plated wheels as they are susceptible to chemical effects.

OKO LifeLong is a free-flowing liquid (not a sealant) that coats wheel rims and the interior of large vehicle tyres – it uses advanced nanotechnology to actually clean and resist rust on rims; as well as cooling and lubricating the tyre rubber, making it easier to mount/dismount and lengthening tyre life by 30% on average. Operators who do not suffer many punctures but who have expensive wheel/tyre replacement costs can save a massive amount.

Does OKO puncture sealant affect tyre life or performance?

Performance: OKO does not affect tyre structures or rubber adversely. In most cases the tyre life will be extended by up to 20% (LifeLong: 30%) as OKO cools the tyre and lessens air loss. OKO sealants will also reduce the possibility of tyre life being shortened due to “Run-flat” damage.

Is OKO safe and legal to install in my tyres?

Yes, it is both a safe and a legal form of puncture prevention.

Can OKO be installed in any tyre?

OKO can be applied to almost any Pneumatic tyre (see limited exceptions on the relevant Products page).

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