Magic Milk Innertube-Pro Hi-Fibre sealant bottle — front view

Magic Milk Innertube-Pro Hi-Fibre sealant in use — DH, enduro and MTB tube riding

Magic Milk Innertube-Pro Hi-Fibre sealant bottle — back view

Magic Milk Innertube-Pro Hi-Fibre sealant — full bottle range

Magic Milk Innertube-Pro Hi-Fibre sealant — 20-litre workshop size for race teams and bike workshops

Magic Milk Innertube-Pro Hi-Fibre

Q: How much sealant do I need per tube?

20-24" 140ml. 26" / 650B / 700c 160ml. 27,5"-29" 180ml.

£16.99

For MTB riders still running tubes, this is the formula that handles what tubes take the worst — snake bites, pinch flats, slits up to 7 mm. Water-based, lasts the life of the tube, CO2 compatible.

Size: 500ml

500ml 5L 20L

Quantity:

Product Features

Tested in Downhill, Enduro and MTB
Water-based: lasts the life of the tube and tyre
Compatible with CO2
Seals up to 7 mm pinch flats and tube punctures

For innertube tyre systems. For MTB tubeless, use Magic Milk Tubeless-Pro Hi-Fibre.

Product Description

The same fibre technology that sealed AON Racing's tubeless tyres — rebuilt for riders who run tubes. Innertube-Pro Hi-Fibre handles snake bites, slits, and punctures up to 7 mm. It's CO2 compatible, works from −20°C to +50°C, and runs at the pressures DH and enduro riders actually use. The strongest innertube sealant in the Magic Milk line.

How it seals

The fibre-reinforced formula works the same way it does in the tubeless version: when air escapes, fibres rush to the breach, pack the hole, and bind into a durable seal — not a temporary patch. It doesn't ball up inside your tube. It doesn't migrate and dry out under hard riding.

Specs

Max puncture sealed: 7 mm — including snake bites and slits
Pressure range: 30–120 psi
Temperature range: −20°C to +50°C
System: innertubes — MTB, DH, enduro
CO2 compatible
Non-corrosive — safe for tubes and rims
Made in the UK

Why fibre-reinforced

Most innertube sealants are liquid patches — they fill a hole and hope the pressure doesn't push them out. The fibres in this formula cross-link under pressure, turning the seal from a plug into a bond. It's the difference between a tube that limps home and one that finishes the descent.

Bottle Size

500 ml
For those who require a bit more for race days or workshops, the 500ml bottle is a great option. Offering multiple top-ups, it’s perfect for serious riders who need to go through several repairs on race day or for bike shops handling multiple repairs in a short time.

Usage Info

For use with removable-core Presta, and all Schrader, tube valves.
Lasts as long as your tube or tyre.
For MTB Tubed tyre systems. (For MTB Tubeless, use
Magic Milk Hi-Fibre Tubeless).

Dosage & Quantities

20-24" 140ml
26" / 650B / 700c 160ml
27,5"-29" 180ml

Sealant Applications

The OKO Cap
Fitted with OKO's patented Cap technology, an industry first, applying sealant has never been easier. After three years of development, the OKO Cap utilizes the latest material technogies to fit seamlessly with your valve system. In the workshop on or on the go, outfitting your tyres with bike sealant's best kept secret couldn't be easier.

The OKO Injector

To make application even easier and more efficient, the OKO Injector system (sold separately) is the perfect tool for larger quantities. This injector allows for quick, precise application with minimal mess, meaning you can top up tyres in seconds, ensuring a seamless experience for both technicians and riders. The easy-to-use injector makes it simple to apply the right amount of sealant each time, saving time and reducing waste, so you can keep your operations smooth and efficient.

The OKO Pump
The high-quality stainless steel pump (sold separately) with the 20-litre drum is built for precision and durability. It ensures accurate dosages every time, allowing you to apply the perfect amount of sealant without any waste. The pump is engineered for longevity, making it an essential tool for high-volume use, whether you're managing a busy repair shop or prepping for a large-scale event.

The 20-litre drum offers incredible value and performance for commercial-scale applications, ensuring that your team can handle large demands without compromise. Magic Milk continues to deliver world-class sealant, whether you're a professional or just need to keep your tyres sealed in bulk.

Frequently asked questions

How much sealant do I need per tube?

20-24" 140ml
26" / 650B / 700c 160ml
27,5"-29" 180ml

What does it actually do for a snake bite?

A snake bite is two parallel pinch holes punched into the tube when the rim impacts an edge. The fibre formula is built for that exact failure: as air rushes out of both holes, the fibres rush to both breaches and pack them simultaneously. You feel a quick pressure drop, then the tube holds — and you finish the descent.

Which valves does it work with?

Removable-core Presta valves and all Schrader tube valves.

Is it CO2 compatible?

Yes — fully CO2 compatible. Use a CO2 cartridge for emergency reinflation without affecting the sealant.

Can I use this in a tubeless setup?

No — Innertube-Pro Hi-Fibre is for inner tubes only. For tubeless tyres, use Magic Milk Tubeless-Pro Hi-Fibre.

HI-FIBRE FORMULA FOR INNERTUBES

Same fibre-reinforced approach as the tubeless flagship, adapted for innertubes. When a snake bite or sharp impact opens the tube, the quick-seal fibres pack the hole and bind fast. It seals punctures up to 7 mm instantly — slits, pinch flats, and standard holes. The formula is water-based and stays active for the life of the tube.

SEALS 7MM SNAKE BITES

Built specifically for the punctures that end rides — snake bites and sharp impacts up to 7 mm. Water-based formula, CO2 compatible, safe for tubes, tyres and rims. Seals in seconds so you keep moving.