Tubeless sealants and adhesives

Tubeless sealants, tyre adhesives, and puncture repair compounds are an integral part of modern cycling, especially with tubeless tyre systems. They help prevent punctures, increase tyre reliability, and simplify maintenance during and after the ride.

Tubeless sealant

Tubeless sealant is a special liquid that is poured into the tyre when installing a tubeless system. It serves two main functions:

Tyre-to-rim seal – helps create an airtight connection between the tyre and the rim
Repairing punctures while riding – in the case of minor punctures (e.g. thorns, sharp stones), the sealant reacts immediately, hardens and closes the hole

Advantages:

Automatic repair of minor defects
Lower weight compared to inner tubes
Ability to ride at lower pressure for better traction

Disadvantages:

Requires regular inspection and replenishment (every 2–6 months)
May be ineffective on larger cracks

Tyre adhesives (Rim cement, Tubular glue)

Tyre adhesives are mainly used for tubular tyres, which are glued directly to special rims. In this case, it is a traditional system, used mainly in road cycling and racing environments. Use of tyre adhesive:

Rim cement (e.g. from Continental) is applied to the rim and the bottom of the tyre
Once dry, it creates a strong bond between the tyre and the rim, reducing the risk of the tube slipping off while riding

Advantages:

Secure attachment of the beads for high speeds
Ideal for competitive road cycling

Disadvantages:

The application is more demanding and requires precision
Dismantling of the tubular is laborious
Not designed for modern tubeless systems

Vulcanized adhesive for defects

Vulcanized glue (also called vulcanizing glue) is a special glue designed for repairing inner tubes using patches. It works on the principle of the so-called cold vulcanization process, in which a chemical bond occurs between the inner tube and the patch, creating a strong, durable and flexible joint.

Advantages

Permanent repair of tube defects
High flexibility and joint durability
Easy and quick to use
Works with both butyl and natural rubber tubes

Disadvantages

Designed for inner tubes only, not for tubeless systems
The joint must be clean and roughened (with sandpaper)
It is important to let the glue dry before applying the patch

How often should tubeless sealant be added to the tyre?

It is recommended to check and refill the sealant every 2 to 6 months - depending on conditions, temperature, and type of riding.

Can tubeless sealant seal every puncture?

No. The sealant usually can handle punctures up to 4–6 mm. Larger damage requires repair with a wick.

Is it possible to mix different brands of tubeless sealant?

It is not recommended to mix different sealants - precipitation or loss of effectiveness may occur.

How is sealant applied?

Either directly through the valve (with the valve core removed), or before mounting the tyre. The tyre is then inflated and spun to evenly distribute the sealant.

Is vulcanization glue suitable for repairing tubeless tyres?

No. It is only intended for repairing classic tubes. Tubeless systems require sealants or special patches.

Check out our video "How to fit tubeless tyres"

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Sealants, adhesives and puncture sealing