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.

I've been trying it out for a year after some issues with the regular. Seems to last a few months for me between top offs in VA climates. It's time for more when the tires seem to lose pressure week to week. I've seen it seal some pretty good holes and I've been told the barnacles you find stuck to the inside of the tire are where the sealer clotted a hole. I've found some holes on top ups that I never noticed while riding. The downside is you cannot inject it in the valve stem. I'll take the hassle for it working well. Pretty expensive. I'd say I top up every 4/6 months. I'll try to report back as my riding group is testing a few sealers and I've been the stans race user. Update: I just used up the last of my first bottle. I'd say it's been about a year and I was pretty generous. I haven't had any noticeable holes but did find barnacles fused into the tire carcas on top offs here and there evidence of a small hole. Ordered another bottle to keep trying it.

Very good

Used both normal stans sealant and this one for years. With normal sealant from time to time was getting punctures which sealant wasn’t able to fix quickly (was loosing lot of air pressure) or at all. Switched to race sealant and didn't even notice punctures for years, while I had cuts on tires(but it was fixed that fast tha wasn't noticing during rides). Recently my new bike came with small bottle of normal sealant and I put it in my tires again… got puncture within a month which sealant wasn't able fully fix, but allowed me to get back to my car. Hole want really big, race sealant solved the problem. So, since now only race sealant again. For road tires with hight pressure, race sealant the only one which actually works, at least fir me, normal barely can fix anything.

I have been using Stans Race sealant for 3 years. I have no reason to change. This stuff has been tremendous. I do care regular Stans in case I need to add sealant on a ride but have not needed it since switching to the Race Sealant.

I am a fan of stan's sealant. I have been using the standard product for years. I tried this new one and i am totally disappointed. I waited several months and several refills before writing and i can tell now this product is really a poor one. It clogs any siringe, any size. I tried also to pour in a glass and get in the siringe only the fluider part on the top, still crap. It is not sealing like the original one, it is drying faster. It makes a mess when you put it in the valve, because you cannot use the small tube, it is too dense and clogs everything. Now i ordered again the standard one, and this bottle, at half now, is going straight to the trash, it's total crap for presta valves. Do not buy it, buy the original stan's sealant, which remains the best sealant on the market.

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

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

Very good product work as described! Quick delivery!

J'utilise ce produit, et aucun souci. Je suis en totale confiance

Excelente!!