The Original Tubeless Sealant for Road, Gravel and Mountain Bikes.
Stan’s Original Tubeless Sealant is the formula that helped make tubeless bicycle tyres practical. First developed in 2001, it coats the inside of the tyre and reacts when air escapes, sealing many small punctures before they interrupt your ride.
It remains Stan’s best all-round option for road, gravel and mountain bike tubeless systems. The low-viscosity formula moves freely inside the tyre, helping it reach punctures quickly while also dealing with porous casings and slow leaks.
Reliable Puncture Protection
Stan’s Original contains sealing particles that remain suspended in the liquid and gather around a puncture as air escapes. It is designed to seal holes up to approximately 6.5mm under suitable conditions.
Actual results depend on the tyre, puncture shape, remaining pressure and riding conditions. Larger cuts may require a Stan’s DART or another suitable tubeless plug. We still recommend carrying a plug tool, inflation device and spare tube on longer rides.
How Much Sealant Do You Need?
- 700 × 28c: Approximately 50ml per tyre
- 700 × 32c: Approximately 55ml per tyre
- 700 × 40c: Approximately 60ml per tyre
- 29 × 2.3 inches: Approximately 105ml per tyre
- 29 × 2.4 inches: Approximately 110ml per tyre
- 29 × 2.5 inches: Approximately 125ml per tyre
These are useful starting points. Wider tyres, more porous casings and some new installations may require additional sealant.
Easy Installation and Top-Ups
The sealant can be poured directly into the tyre during installation or injected through a compatible valve with a removable core. Shake the bottle thoroughly before use so the sealing particles are distributed evenly.
After adding the sealant, inflate the tyre and rotate the wheel through several positions to coat the complete inner surface. Check around the bead and valve for escaping air before riding.
Regular Maintenance
Stan’s Original normally remains liquid inside the tyre for approximately two to seven months. Hot, dry conditions and porous tyre casings may require more frequent checks.
Inspect the sealant level regularly and top it up before it dries completely. Store the bottle sealed in a cool, dry place away from direct sunlight and extreme temperatures.
Anti-freezing agents allow the formula to work in temperatures down to approximately -28°C.
Key Features
- Original Stan’s tubeless sealant formula
- Suitable for tubeless road, gravel and mountain bike tyres
- Seals punctures up to approximately 6.5mm under suitable conditions
- Low-viscosity formula spreads around the tyre
- Helps seal small punctures, porous casings and slow leaks
- Can be poured directly or injected through a removable-core valve
- Remains liquid for approximately two to seven months
- Works in temperatures down to approximately -28°C
Our Thoughts
Stan’s Original remains a dependable choice if you want one sealant for several different bikes. It is straightforward to install, easy to top up and supported by widely available Stan’s valves, injectors and DART repair tools.
For road and gravel tyres regularly run between 35 and 100psi, Stan’s Rolled Gold is the more specialised high-pressure option. For general gravel, mountain bike and mixed workshop use, Original remains the practical all-rounder.
Why Buy from Chain Reaction?
- Advice on tyre, rim and sealant compatibility
- Professional tubeless installation available
- Independent Christchurch bike shop
- Nationwide New Zealand delivery
Specifications
- Brand: Stan’s NoTubes
- Product: Original Tubeless Sealant
- Volume: 500ml
- Use: Tubeless road, gravel and mountain-bike tyres
- Maximum stated puncture size: Approximately 6.5mm
- Liquid life: Approximately 2–7 months
- Cold-temperature performance: Down to approximately -28°C
- Application: Direct pour or injection through a compatible removable-core valve