UK: +44 (0)238 155 0058

Spain: +34 952 53 41 55

OKO X-Treme for serious Off-Road use

The World’s Strongest Off-Road Bike Tube Tyre Sealant
Seals slits, snake bites/ pinch flats and holes like no other product
Now deals with slits and holes up to 7mm
Lighter and freer-flowing formula
The Choice of Winners
Finish your ride when others fall by the wayside


NEW FORMULA X-Treme is a genuine step forward in tubed tyre sealant performance – a real breakthrough product that fights bigger holes and even slits.

Designed for the needs of off-road competitors and weekend riders, it is the difference between making it home and being left stranded by a ‘snake bite’/ pinch flat.

It has been tested in the most demanding downhill, extreme and cross-country events and has been the difference between winners and losers.

One 400 ml bottle will protect both a rider’s tyres, with enough to spare.

Like OKO Puncture Free, it also works for full UST wheel/tyre tubeless set-ups in the case of those who will be putting their bikes through extreme tests. But we recommend you use OKO Magic Milk if you are using ‘tubeless ready’ tyres.

400 ml bottle deals with one bike: for 26” MTB or Cross Country tyres you now only need 160ml for ultimate protection.

Simple fitting, using the valve core remover and filling tube supplied in every bottle cap.

25 litre drum is ideal for retailer and team service workshops: the NEW heavy-duty all-alloy drum pump is a one-time purchase and can be rinsed out again and again for repeated use in filling tyres rapidly. It uses the unique OKO Bike drum pump with adjustable dosage, plus it has Schrader and Presta valve fittings.


Not latex-based
Lasts the life of the tyre
Combats larger punctures than any other sealant
Seals multiple holes: has aramid fibres and other enhancements for super sealing
Contains corrosion inhibitors
Non Hazardous


Non Corrosive: Non Flammable: Non Hazardous (not excluded from air shipments unlike some ammonia-containing products). Washes out of the tyre if required.

NO ADVERSE AFFECT UPON TYRES OR RIMS (contains anti-corrosion agents).

WORKS WITH INNER TUBES and FULL UST TUBELESS WHEELS/TYRES, with Schrader or removable-type Presta valves.

(‘Tubeless Ready’ tyres require rim tape, and OKO Magic Milk™ sealant: check the compatibility of your proposed rim and tyre combination before attempting).

Colour: Natural Off-White. Viscous. Low Odour.

20-24″ MTB: 140ml
26” MTB: 160 ml
29″ MTB: 180 ml

For maximum accuracy, for use with Presta valves, and for a host of workshop uses, use the OKO Tyre Sealant Injector.

OKO Puncture Free Tariff Number: HS. 3824. 90. 96
OKO Pressure Application Pump Tariff Number: HS. 8413. 20. 90

OKO X-Treme is designed primarily for off-road riding and is not recommended for high-speed on-road cycling: for all-purpose inner tube use, select OKO Puncture Free for Bikes.

No risk and safety labels or warnings are required since this product is not classified as hazardous under current regulations. Normal safety precautions should be taken: wear gloves and protect eyes. Rinse product off any clothes that it may be spilled upon. Keep away from children. If swallowed, see a doctor.


Send us an enquiry about this product

This is a unique website which will require a more modern browser to work! Please upgrade today!