Created by Stan’s Racing Development (SRD), the new high-performance Race Sealant has been designed for and tested by top racers in the most demanding conditions around the globe, and it’s now available to riders everywhere. It’s the next level of sealing power from the company that invented tubeless conversion.

“When everything is on the line, this is the sealant you want in your tires,” said Stan Koziatek, Founder and Owner of Stan’s NoTubes. “We’ve worked with the pros to create a sealant that seals more quickly and more reliably, meaning less air is lost during punctures so you can get to the finish line faster.”



Behind the Scenes with Stan's Racing Development (SRD)

If you've ever walked through the mechanics' pits at any national or international event, chances are you've seen them: trademark Stan's NoTubes black quart bottles with no labels. If you had looked closer, you might have seen strange symbols scrawled all over the bottles with a silver marker. They were the letters, numbers and sealant formula notes of the man himself, Stan Koziatek.

From cross country and downhill mountain biking to cyclocross, a passion for racing has always been a driving force for Stan's NoTubes' products. Stan's Racing Development (SRD) is a new in-house division created to pursue high-performance, race-oriented products developed and tested through the rigors of professional racing at the highest levels. SRD products are the embodiment of all of the time spent determining how to shave tenths of a second from the clock by developing the absolute best equipment that provides our athletes with an advantage on race day.

Stan’s NoTubes new Race Sealant is the first SRD product we’re making available.


About the new Race Sealant

For more than 14 years, Stan’s NoTubes has been quietly formulating a special racing version of our legendary sealant for many of cycling's most successful teams. Working with athletes who push themselves and their tubeless systems to the absolute limit, we developed a proprietary sealant formula we call Race Sealant.

Race Sealant starts with the same premium low-viscosity latex blend that we developed when we invented tubeless conversion 15 years ago. Like our standard sealant, new Race Sealant is formulated to perform in temperatures as low as -30 degrees Fahrenheit (-34.4 degrees Celsius) to let you ride where and when you want. Of course, we also used natural materials to ensure that our sealant is non-toxic, non-hazardous and safe for humans and the environment.

The key difference is the amount and type of sealing crystals used in creating Race Sealant. With nearly twice the amount of our standard sealing crystals, plus additional "XL" crystals capable of sealing even larger punctures, Race Sealant is designed for maximum sealing power. The combination of new larger and more smaller crystals interlock to form a lattice work that not only seals punctured tires faster but also strengthens and reinforces them.

Racers love our Race Sealant because it’s lighter, works faster, and seals even larger punctures.

"Stan's Race Sealant allows us to use less sealant and get the same performance,” said current U.S. Cross Country and Short Track Mountain Bike National Champion Chloe Woodruff of the Stan’s NoTubes-Pivot Team. “Race Sealant gives us an edge over the competition because it's lighter and highly effective.”

Stan’s NoTubes Crest wheels filled with the new Race Sealant.

Race Sealant is different from our traditional sealant in that it must be installed directly into the tire. The quantity and size of its crystals in our new special formula will clog injectors and smaller bottles almost immediately.

Luna Chix Pro Team Mechanic Dusty Labarr said, “Stan’s NoTubes Race Sealant is the most important item on my checklist of things to take to every race. It’s essential for a great ride. It doesn’t matter if you are trying to get on the podium at Worlds or are just trying to make it back to the truck before it gets dark. If you have Stan’s Race Sealant in your tires, you’re going to get there.”

Timeline: 15 years of Stan’s NoTubes

2016 marks 15 years in business for Stan’s NoTubes. It all started in 2001, when owner Stan Koziatek started selling his soon-to-be-famous sealant and tubeless conversion kits, which became popular among mountain bikers sick of changing flats in their traditional tube-filled tires. Before long, Stan’s NoTubes was also designing tubeless wheels and wheelsets for riders of all disciplines around the world, and the product line now includes tubeless-ready wheels for mountain bikes and road bikes.

Stan’s NoTubes new logo, shown here on the kit of U.S. Cross Country and Short Track Mountain Bike National Champion Chloe Woodruff (Stan’s NoTubes-Pivot MTB Team). Credit: Stan’s NoTubes-Pivot MTB Team.

Here’s a quick look at the history of Stan’s NoTubes:


  • Stan Koziatek begins experimenting with liquid sealant as a replacement for inner tubes.


  • First batches of sealant are tested by riders like Thomas Frischknecht on the World Cup circuit.


  • Stan Koziatek begins selling sealant and conversion kits.


  • Stan Koziatek begins developing a rim.


  • First alloy ZTR Rims are sold.


  • First BST rim is tested by riders: Marie-Hélène Prémont wins a silver medal using Stan’s NoTubes sealant and Sabine Spitz wins a bronze medal using both the sealant and prototype rim at Athens Olympics.


  • Olympic rim with Bead Socket Technology (BST) becomes available.
  • 2007
  • Flow and Arch alloy rims and wheels are released.


  • First alloy road tubeless rims get released.


  • Valor, Stan’s NoTubes first carbon fiber rim with Bead Socket Technology (BST), is released.


  • Neo hub design is tested by riders.


  • New Neo hub system is introduced.
  • Bravo carbon fiber trail wheelset is launched.
  • Avion carbon fiber road wheelset is released, marking the official introduction of BST-R rims designed to handle special requirements of road tubeless.


  • Stan's Racing Development program is unveiled.
  • Stan’s NoTubes Race Sealant is introduced.