Muc Off - MTB Tubeless Sealant 1L

Muc-Off No Puncture Hassle Tubeless Sealant is hands down one of the best sealants I’ve used for my MTB. It delivers on its promise and keeps me riding worry-free! Why It’s Awesome: ✔️ Seals Punctures Fast – Instantly plugs holes up to 6mm, keeping my rides smooth and uninterrupted. ✔️ Long-Lasting Formula – Stays effective for months without drying out too quickly. ✔️ Works in All Conditions – Performs well in both hot and cold weather, ideal for year-round riding. ✔️ Easy to Apply – The included nozzle makes it mess-free and simple to pour directly into the tire. ✔️ UV Detection Technology – Helps spot leaks so I can be sure my tires are properly sealed. ✔️ Ammonia-Free & Safe – Won’t damage my rims or tires, unlike some other sealants. I’ve taken this sealant through rocky trails, muddy tracks, and rough terrain—it never lets me down! If you're running tubeless, this is a must-have. Highly recommend! 🚴‍♂️💨 Works like magic!

Great little product does the job seals the holes? Good to carry on? Really easy to install in your inner tube by removing the valve of said inner tube and insert sealant.

I've been using Muc-Off Tire Sealant for a few months now and it's exceeded my expectations. Installation was quick and mess-free thanks to its smooth consistency, and the UV detection feature is a clever touch for spotting any issues early. What really impressed me was how quickly it sealed punctures—I hit a thorny section on a trail ride and barely noticed the leak before it sealed up within seconds. No pressure loss, no stopping, just confidence to keep going. It’s lightweight, eco-friendly, and doesn’t clump like some other brands I’ve tried. Highly recommend it to anyone who wants a reliable sealant that just works when you need it most!

I've churned through loads of different sealants in my road bikes and mountain bikes. This one from Muc-off is one of the better ones. Setup was fine, typical level of hassle seating the tyre on the rim. It's one of the thicker sealants so needed a little more time to spread around the inside of the tyre before seating. For me the most important feature of most sealants is the ability to plug a hole or a cut quickly. Here the muc-off sealant does very well, with some caveats. Firstly, you absolutely must shake and invert the bottle before filling. If you don't, you won't get any of the black sealing lumps in and it becomes pretty useless. I forgot to shake when filling one tyre, and when I ran through some sharp flints the sealant happily ejected through several small holes with no sign of sealing. Replacing the lost sealant with some that was thoroughly mixed sealed them instantly. Secondly this struggles when it's very cool and wet (so British winter/spring/autumn and, tbh, summer). On a dry day the sealant works fine at any temperature. But if your wheels are sat in cold wet puddles the sealant doesn't really solidify and continues to seep steadily through punctures. This is a bit of a disaster when you do the usual trick of putting the puncture at the very bottom of the wheel to allow sealant in; you end up with the wheel on wet ground and the water promptly de-seals the rupture. So I have resorted to drying the wheel around the puncture, then getting sealant in by spinning it fast to distribute sealant around. 30 seconds in dry air usually gets the hole sealed. All of that said... when it's working, this seals bigger holes than Stans or Orange Seal and does so more quickly. It lasts far longer too, mine has still been good after six months or so (thanks cool, damp british climate!). It's made me almost immune to the shards of glass, stone, tacks that litter the roads

I am new to tubeless set ups and I found this item to be easy to use. So far it works and hasn’t failed me. The price is OK I think.

sealent for tubeless tires and rims, sealed fully, tho does take a few days to fully stabilize, but once it is fully sealed, the job is done

Sealed my tyre perfectly and air never leaked again. Very easy to use

Never tried muck off sealant and I decided to give it a try. Haven’t had any flat, but the sealant last much less than stans, which is the brand I’ve always used and will continue to use.