Muc-Off Tubeless Sealant Kit: Step-by-Step Setup Guide
By Bicycle Superstore | Published: 2026-11-01
Category: How-to Guides
Learn how to use the Muc-Off Tubeless Sealant Kit 140ml for a reliable tubeless setup, including how much sealant to add and the checks that prevent leaks.
Quick answer
Use the Muc-Off No Puncture Hassle Tubeless Sealant Kit 140ml after mounting and seating your tubeless tire, then inject the sealant through the valve with the core removed and reinflate to distribute it. The exact amount depends on tire size, so start with the volume that coats the casing without pooling.
Why setup order matters with this sealant
Muc-Off's formula is designed to seal instantly once it reaches the puncture, but it can only do that if the tire is already seated and the bead is locked. Adding sealant before the bead seats often leads to sealant spilling out around the rim and a messy redo.
The kit's UV detection system is a practical check: after a ride, shine a UV light around the tread and sidewalls to spot weeping holes you might otherwise miss. That makes the post-setup inspection part of the process, not an optional extra.
How much sealant to add
There is no single number that fits every tire. As a working range, many riders use roughly 60–120 ml per tire depending on width and casing volume, but the Muc-Off kit's 140 ml bottle is a single-tire supply for larger tires or a top-up for two narrower ones.
If you are unsure, err on the lower side first. You can always add more through the valve, but removing excess sealant means breaking the bead and cleaning the tire.
Tubeless setup steps with the Muc-Off kit
- Seat the tire dry first: Mount the tire with a tube or using a compressor/booster to seat the beads, then deflate and remove the valve core. Common mistake: adding sealant before the bead is seated, which makes a mess and wastes sealant. Check that the bead line is even around the rim before you add any sealant.
- Measure your sealant volume: Shake the Muc-Off bottle well, then measure roughly 60–120 ml depending on tire width. For a 140 ml kit, that means one full bottle for a large tire or a partial dose for a narrower one. Common mistake: guessing without checking tire size, leading to either a dry tire or excess pooling. Keep a note of the volume you used so you can repeat it at the next top-up.
- Inject through the valve: With the valve core removed and the valve at the 6 o'clock position, inject the measured sealant using the kit's applicator. Refit the core and inflate to your normal pressure. Common mistake: injecting with the valve at the top, which sends sealant back out. Listen for air leaks at the valve core after refitting; tighten if needed.
- Distribute and check for leaks: Spin the wheel and bounce the tire to spread sealant, then leave it flat for a few minutes on each side. Inspect the tread and sidewalls for weeping. Common mistake: skipping the side-to-side rotation, which leaves dry patches. Use a UV light after your first ride to spot any pinholes the sealant has not closed.
Product facts
- Muc-Off No Puncture Hassle Tubeless Sealant Kit 140ml: The kit contains 140 ml of Muc-Off No Puncture Hassle Tubeless Sealant, supplied in a size option. That volume is enough for one large mountain bike tire or a top-up on narrower tires, so plan your purchase around your tire size.
Muc-Off No Puncture Hassle Tubeless Sealant Kit 140ml
