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Peaty’s unveils new Holeshot Biofibre tubeless sealant

New sealant claimed to be both more effective and environmentally friendly

Peaty's Holeshot Biofibre tubeless sealant

Peaty’s has launched a new formula for its Holeshot Biofibre tubeless sealant, following two years of development. It claims the updated sealant will “right any wrongs” of the version it replaces.


The thick, white tubeless sealant from Peaty’s has received a number of mixed reviews over the years. While it certainly has some strong points, it’s far from perfect, which may explain why it doesn’t feature in our list of the best tubeless sealants in 2022.

The new sealant sits alongside the Holeshot puncture plug kit and C02 inflator that was launched recently by the brand named after its co-founder and downhill legend Steve Peat.

The new Holeshot Biofibre sealant replaces the current offering from Peaty’s, which hasn’t always been a hit with riders. Due to some batch inconsistencies back in 2017, success with the rather thick sealant (compared to others on the market) was a little hit and miss.

Although those early manufacturing issues improved, Peaty’s says it was determined to further hone the product, aiming to create a sealant that’s both effective and environmentally friendly.

The brand says it tried 23 different formulations and claims the new Biofibre sealant is its best yet.

Peaty’s Holeshot Biofibre tubeless sealant details

The introduction of biodegradable cellulose fibres is said to result in a more reliable seal.
Andy Lloyd / Our Media

More fibre in the diet

The new formula includes fully biodegradable cellulose fibres within the water-based, ammonia-free latex, which Peaty’s claims helps to provide a quicker, more reliable seal.

The original Peaty’s sealant didn’t include any fibres within the sealant. According to the brand, the quickest and easiest way to achieve a fast seal is to include microplastic fibres in the sealant (these bond with the particles and latex to help plug the hole rapidly).

Microfibres are cheap, but terrible for the planet. As a result, Peaty’s opted to steer clear of them in the new sealant.

After years of searching, the brand say it has found a biodegradable alternative that works effectively. The new sealant is claimed to be environmentally friendly, while Peaty’s says it seals holes more quickly.

There will, of course, be times when sealant won’t be enough to plug the hole and you’ll need to come to the rescue with a tyre plug. Peaty’s says it has tested the new formula with every tyre plug it could find to ensure the Biofibre sealant works with each one.

The new-look sealant is claimed to work consistently well for at least six months before its performance starts to taper off.

Witness the thickness

Peaty’s tells us the new formula is thinner than the one it replaces.
Andy Lloyd / Our Media

The previous version of Peaty’s sealant was quite thick in comparison to many of its competitors. While this helped to coat the inside of the tyre, it lacked the mobility needed to slosh around and get to holes quickly enough to seal them before too much air was lost.

Peaty’s says the new formula is thinner and far more mobile, though it says it still has the ability to coat the inside sidewalls effectively. This is claimed to help prevent it dropping too much pressure after initial setup.

This has been achieved by adding a higher concentration of sealing compounds, which Peaty’s claims helps to give a better and more durable seal, when used in conjunction with platelets (small biodegradable bits of glitter floating in the sealant) and biofibres.

Peaty’s says its new sealant will work in temperatures between -20C and 50C, and with pressures from 15 to 120psi.

Plugging the gap

Black is the new blue in Peaty’s updated Holeshot Biofibre tubeless sealant.

Like its predecessor, the new sealant contains platelets – formerly referred to as the ‘blue glitter’ that could be seen floating inside the bottle or sparkling on the inside of a used tyre.

According to Peaty’s, these bond together like platelets within your blood, and help to stem the flow of air from any puncture holes.

The platelets in the new formula are black. Peaty’s say the primary reason for changing to this colour is they appear less messy and don’t stand out as much if you spill the sealant.

These black platelets are said to be fully biodegradable. The brand claims the new sealant will consistently seal up to 6mm holes, and potentially up to 8mm.

We’ve yet to test the new sealant, but keep your eyes peeled for a review in the not-too-distant future.

Peaty’s Holeshot tubeless conversion kit details

The conversion kit includes rim tape, black Mk2 valves and a pouch of the new sealant.

Alongside the new sealant formula, Peaty’s has launched a tubeless conversion kit.

The kit comes in fully biodegradable packaging with instructions for the three-step tubeless setup process. Further information and video guides are available on the Peaty’s website.

Also included is Peaty’s silver-printed rim tape, black Mk2 valves (with a valve cap that doubles as a core remover, while the other can be used to tighten spokes) and the new Holeshot Biofibre sealant. 

Peaty’s Holeshot Biofibre tubeless sealant pricing information

Various size containers of sealant are available. Sizing and prices are as follows:

  • 120ml: £7.99 / €9.99 / $11.99
  • 500ml: £19.99 / €22.99 / $29.99
  • 1 litre: £29.99 / €34.99 / $44.99

Peaty’s recommends the following sealant volumes:

  • Road: 45ml
  • Cyclocross: 75ml
  • MTB 26in: 80ml
  • MTB 27.5in: 90ml
  • MTB 29in: 120ml

Peaty’s Holeshot tubeless conversion kit pricing information

  • Road/gravel kit, 21mm tape / 60mm valves / 120ml sealant: £44.99 / €51.99 / $59.99
  • Cross-country/trail MTB kit, 25mm tape / 42mm valves / 240ml sealant: £49.99 / €57.99 / $67.50
  • Downhill/enduro MTB kit, 30mm tape / 42mm valves / 240ml sealant: £49.99/€57.99/$67.50
  • Downhill wide kit, 35mm tape / 42mm valves / 240ml sealant: £49.99 / €57.99 / $67.50