Magic Milk Innertube Original sealant bottle — front view

Magic Milk Innertube Original sealant in use — everyday and commuter cycling

Magic Milk Innertube Original sealant bottle — back view

Magic Milk Innertube Original sealant — full bottle range

Magic Milk Innertube Original sealant — 20-litre workshop size for bike-share fleets and workshops

Magic Milk Innertube Original

Q: How much sealant do I need per tube?

16-18" 50ml. 20-24" 80-100ml. 26"/650B 100-140ml. 700C 100-120ml. 27,5-29" 120-150ml.

🇬🇧 Made in the UK

£11.99

Puncture prevention for everyday bikes — commuters, folders, tourers, urban bikes, e-bikes. Water-based, lasts the life of the tube, seals holes up to 4 mm. The 20-litre workshop size covers any bike fleet.

Size: 250ml

250ml 5L 20L

Quantity:

Product Features

Water-based: lasts the life of the tube and tyre
Safe for tubes, tyres and rims
Seals up to 4 mm punctures

For innertube tyre systems. For MTB tubeless, use Magic Milk Tubeless Original.

Product Description

For riders who just want to stop getting flats. Innertube Original goes into your tube — commuter bike, tourer, e-bike, kids' bike — and gets on with it. It seals punctures up to 4 mm and lasts the life of the tube. You won't notice it until you need it. That's the point.

How it seals

When a puncture opens, the sealant flows to the breach and seals it from the inside under pressure. The seal is durable — it doesn't need heat, CO2, or a second application. It holds at the pressures commuters, tourers, and e-bike riders actually run, from 30 to 80 psi.

Specs

Max puncture sealed: 4 mm
Pressure range: 30–80 psi
Lasts the life of the tube
System: innertubes — commuter, touring, e-bike, kids' bikes
Tube-, tyre-, and rim-friendly
Washes off with water
Made in the UK

Why water-based

No solvents. No corrosive chemistry. The formula is safe for every tube material and every rim type — alloy, carbon, plastic. If it gets on your hands or the road, water cleans it. Nothing to handle carefully. Nothing to dispose of carefully.

Bottle Size

250 ml
The 250ml bottle is perfect for everyday riders who need a quick and easy solution for punctures. It fits conveniently in your backpack or tool kit, making it ideal for emergency fixes on the go.

Usage Info

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

Dosage & Quantities

16-18" 50ml
20-24" 80-100ml
26"/650B 100-140ml
700C 100-120ml
27,5-29" 120-150ml

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?

16-18" 50ml
20-24" 80-100ml
26"/650B 100-140ml
700C 100-120ml
27,5-29" 120-150ml

Will the sealant affect ride quality or balance?

No. Once installed and the tyre is up to running pressure, the sealant flattens against the inner tube wall and behaves like a thin coating. There's no measurable effect on rolling weight or wheel balance at normal commuting speeds.

Which valves does it work with?

Removable-core Presta valves and all Schrader tube valves.

Does it work in tubed e-bikes?

Yes. Innertube Original is built for everyday tube riding — commuters, tourers, e-bikes, kids' bikes, urban hire fleets.

Can I use this in a tubeless setup?

No — this is for inner tubes only. For tubeless tyres, use Magic Milk Tubeless Original.

INNERTUBE SEALANT FOR EVERYDAY BIKES

Commuter bikes, folders, tourers, urban bikes, e-bikes — Innertube Original works across all of them. Install it once and it seals punctures up to 4 mm quietly in the background. Water-based formula lasts the life of the tube. Nothing to adjust, nothing to monitor.

LONG LASTING PERFORMANCE

Water-based and designed to stay active for the life of the innertube. It doesn't dry out, doesn't clump, and doesn't need re-applying every season. Put it in, and it works until the tube does.