Stan’s NoTubes Race Sealant, Tire Sealant for Bike Tire Repair, 32 Fluid Ounces

I read that this sealant clogs your valves, dries fast, etc. I also read its the best ever. I've been hesitating for a couple of years and finally decided to give it a try. Well, it's good. It will seal things my other sealants (stan normal sealant, orange sealant, and a couple of others) will not. That also surprised me because i didnt really expect it to work better. This will also seal broken tape (don't ask why i tested that ;-), while others wont. I've tested this on 3 bikes to be sure. A road bike with 32mm tires and rims that werent made for tubeless, and 2 mtbs with modern tubeless rims/tires. Pros: - actually seals larger holes and more little tire/rim, or even taping issues - no air loss after a month (I'd get air loss with regular sealant after a week) - it can go through your valve's stem (do remove the valve from the stem) without clogging despite official recommendations. just use an injector with a large hose and go slow. Small hoses will clog, going too fast will clog. I've checked the entire stem afterwards, no problem. - it didnt dry after a month in my 60F climate Cons: - well it cost more ;-) I'll see if it dries faster after 4-5 month, but so far it seems to behave well - and in any case, the added "sealing power" is already worth it

This is now my go-to sealant. This is much better and thicker than the regular Stans. It is so think that trying to install it through the valve stem clogs it up so quickly. So, its a little less user friendly because you have to break the bead and pour it into the tire directly, but that is not a deal breaker. I have used this on three different bikes now, and know it works well, especially on the thin gravel tires I use. It is definitely more expensive that the regular Stans, but has the ability to hold up better.

I gave it five stars because it seals tires just as good as Original Stans. But it's not as easy to use. Race Stans has big chunks in it, so you can't inject it into the valve stem using a little syringe. You CAN inject it using a big irrigating syringe and a piece of tubing that fits over the syringe nozzle and the Presta valve stem. Even so, it might get clogged. The other difference is that after a few hundred miles, there can still be liquid in the tire, but it's no longer useful. Upon examination, there was white sealant on the inside of the tire, and some remaining clear, viscous liquid. It's my fault for not checking more closely, but now I know how the Race Sealant behaves. In the future, I think I'll stick with Original Stans. But if Race Stans is all I can get, I won't hesitate, now that I know how it behaves.

What can I say? If you use this, you know that Slime can't do the job of this. It is important to keep it closed when not in use, keep it shook up and make sure you clean any syringes or tubes you use to get it in the tube or tires and it will serve you well and keep you from walking to a service station or the bike shop.

Works great. Couldn’t use in one set of wheels because you can’t mix this with other brands. Oat attention before you buy.

My favorite sealant for mountain bike tires and some road / gravel tires. This stuff works great with tires that are lined with butyl - most black tires are and almost all MTB tires are. With these tires, this will seal 3mm holes easily. I've used some Compass / Rene Herse / WTB tires with skin walls and tan walls that don't tend to seal very well or at all (or it leaks out the sidewalls). The sealant doesn't stick to the casing on those tires so can't form a plug. That's a tire problem though, not a sealant problem. Only downside is having to unseat a few inches of the tire bead to add sealant since you can't use the injector like with Stan's Original - but you get good at that pretty quickly.

So far so good only loses a slight bit of pressure good stuff

Nobody makes a better sealant. I just rode through and area with some heavy thorns on the ground and got several punctures and they all sealed up immediately. I counted about 12 holes on the front tire alone. I only lost about 10psi which is spectacular. It is pricey but completely worth it. The race sealant has more particles so the holes seal up super quick. Do yourself a favor and ditch that goofy orange goop that your local bike shop is selling and buy yourself a bottle of stans race sealant. ** Important** Follow the instructions and pour directly into the tire prior to inflation. This stuff will clog your valves(learned the hard way). This sealant is very effective.

このシーラントは、粒子が大きめですので、タイヤを少し外して入れます、空気口からは、つまってしまいます、粒子が大きめのおかげで、多少のパンクでも空気を抜けません、コース走行出途中パンクして空気ゼロになりますとずっと押していかくては、ならないので是非こちらをオススメします

Race sealant is the best version of Stans: comes spurting out like something in an 80s blue movie. Seals well.

The sealant must be old old stock as there is huge lumps of what looks like calcium in the bottle.

Ce produit est rempli de particules granuleuses susceptibles de boucher les soupapes et de mettre à mal l'étanchéité entre la jante et le pneu en utilisation tubeless. J'ai demandé un bon de retour à Amazon mais, le retour me sera facturé. C'est totalement inacceptable qu'un vendeur ne prenne pas les frais de port à sa charge alors que son produit est défectueux !! J'attends la suite...

Very good product work as described! Quick delivery!