Tubeless sealant

Tubeless sealant is a liquid you add inside a tubeless tire. It coats the inside of the casing, helps the bead seal against the rim, and plugs small punctures as you ride.

What it's used for

The kit for tubeless e-bike wheels is spare sealant, a valve core remover, a sealant injector and a tubeless plug tool (Park Tool e-bike tools). Sealant only works in a tubeless-compatible tire and rim (Park Tool tubeless guide).

What to look for

• The amount on your tire's label. Use the amount listed on the tire label, not a fixed volume (Park Tool).
• A way to add it. You can pour it in before seating the last bead, or inject it through the valve with the valve core removed (Park Tool).
• The sealant maker's instructions for how often to top up (Park Tool).

Using it safely

• After adding sealant, spin and rock the wheel to spread it. Some setups seal right away, and others can take hours or even days (Park Tool).
• Larger holes need a plug. Stick-on patches won't work on tubeless tires, so use a plug tool for minor punctures (Park Tool tube repair).
• When you remove a tire, expect leftover fluid. Wipe the rim's bead seat clean and dispose of old sealant as its maker recommends (Park Tool).
• Not sure if your bike is tubeless? Check the manual or ask the seller (Park Tool).

Best price we found

• Stan's Original Tubeless Sealant, 500 ml, at Stan's own store: $22.00, checked Nov 9, 2026
• Stan's Original Tubeless Sealant, 1000 ml, at Stan's own store: $36.00, checked Nov 9, 2026

Prices change often, and a local shop may match them.

Videos

Guides that use it

• Tubeless tires and sealant
• Set tire pressure
• E-bike flat tire

Sources

• What tools do I need for my e-bike, Park Tool
• Tubeless tire removal and installation, Park Tool
• Inner tube repair, Park Tool
• Stan's own store: Original tubeless sealant prices