I have used both Stan’s and Orange Seal on my gravel bike and MTB. The gravel bike is running about 30psi and the MTB a little under 20psi. In 8 years I haven’t had any flats that required any kind of repair on either bike. Here in Az cactus spines are the biggest problem off road for me and both sealants take care of them without me doing anything. I top up the sealant about 3 times a year.
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Thanks.
How often do you have to top up Orange Seal?
I try to check monthly… and if it really hot here, a month might dry it out. Spring/Fall is 2-3 months.
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Stan’s Race Sealant, Silca Sealant and occasionally Orange Seal Regular.
Stan’s Race Sealant has been my main go to this year. I change tires often enough I don’t mind popping the bead to pour it in. Also gives me a chance to see what is going on instead the tire.
I’ve used Silca as well, especially for big events. I use Muc-Off tape and usually double wrap my wheels and have had no issues with Silca attacking it. However I’ve 100% had the issue with Silca carbon fiber particles clumping. It seems to happen as the sealant starts to dry out. I tend to put in a lot of the sealant for big events - about 4 ounces per wheel for gravel bike - and with more sealant it seems the clumping doesn’t happen as badly or quickly.
Orange Seal regular works well too but seems to dry out faster than Stan’s.
In short top recommendations are:
- Stans Original or Orange Seal for MTB/gravel <35psi
- Peaty’s Holeshot Biofibre for Road/Gravel >35psi
- Stans Race Day for MTB/Gravel/Road at all pressures
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I can’t get past the smell of Stans!
Magic Milk Hi Fibre for me, which I believe Peatys is a re-brand of.
Great video - thanks for linking.
I hadn’t heard of the Peaty’s Holeshot Biofibre sealant before. Curious to hear anyone else’s experience with it?
Probably because it contains ammonia… don’t sniff that stuff. This may also lead to corroding of brass spoke nipples and some wheels manufacturers specifically recommend avoiding it for that reason. From ENVE:
Also, in the event sealant is able to migrate under your tubeless tape even in extremely small amounts, we do not recommend using sealants with ANY ammonia in their formula due to the corrosive nature of ammonia when in contact with brass, the material our spoke nipples are made of.
That video and the link is basically a meta-analysis of sealant tests, which is useful. Testing sealant after riding for a month like the AMBMag test is really smart. As with any test or meta-analysis, it helps to dig into the details a bit. Most of the tests are MTB. The summary says Orange Seal Original is best at MTB but not so good with gravel/road. However, there is only 1 gravel and 1 road test, and Orange Seal is not even in the road test… so it’s a bit misleading. Orange Seal Original won or was near the top of the majority of the tests and those tests were all MTB.
As I said above, I think Orange Seal Original is best due to consistently good sealing in my real world experience, ease of use (injectable), ease of latex removal from bikes/kit after puncture, widespread availability, etc. Will it win every puncture lab test? No. But seeing crazy lab test results led me to buy Silca, which has carbon strands that ball up, is impossible to remove from kit, non-injectable, dries quickly, might eat rim tape, etc.
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I bought a bottle to use for my road bike but haven’t tried it yet. 
I just bought some Peaty’s sealant a few weeks ago when I couldn’t find any Orange Seal locally right before a 400km brevet. It was almost impossible to syringe into a Reserve Fillmore valve (where you can’t remove the valve core), I had to break the bead seal and dump it in that way. Once it was in the tire I’ve had no problems – it managed to quickly seal a small puncture in my thin Rene Herse extralight casings that I didn’t notice until after the ride when I spotted some dried sealant splatter on the frame. I’m going to get a syringe with a threaded nozzle, which might make it easier to top up through the Fillmore valve.
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I’m genuinely surprised to see so many praise for Stan’s regular in this thread. My personal experience with it is terrible. Myself and my son had a few punctures recently and Stan’s didn’t move a finger to seal them out (not the operator’s fault - there was plenty of that stuff in the tires). Three punctures of various types and sizes, and one was so tiny that ANY sealant absolutely must be able to fix it. Maybe race one is better, but at this point I have zero faith in the brand to give them a second chance.
Appreciate everyone’s opinions. I think I’m gonna try magic milk or Peaty’s now. They look great on paper.
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Me neither. I have had very little luck with regular Stan’s sealing up anything @ road pressure. Caffelatex does a much better job at half the price. It also has an addon for increased sealing but the caffelatex dries up quickly and the addon is impossible to insert without unseating and unseating basically becomes impossible after a while so I am looking for something better. Peaty’s and squirt both seem better, if they can be inserted through the valve…
With Stan’s regular - yes, absolutely. In fact, it happened two days ago (one of the reasons I’m now studying this entire thread very closely, haha).
On Tuesday I had a pinch flat in the rear tire. The puncture itself is totally my fault - I’ve been pushing the lower limits on my tire pressure for a while now, so it was a matter of when, not if. The hole didn’t seem too big, but sealant alone didn’t work. I put a dynaplug in, and it still took me a few minutes of holding and massaging the plug to stop the sealant from hissing. I made it back to the parking lot alright, but next morning I went into my garage to see how bad my rim is (it’s busted), I barely touched the plug and it just came out of the tire with zero force applied. Shame.
I’ve only had a problem with Stans Race opening randomly near the end of life for a tyre that’s done a high mileage. Ive been stationary in a layby waiting for mates to show up then talking to them for 5 mins then psst, and I have to spin the wheel for a bit.
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I think I am going to try that after today.
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Hasn’t let me down yet 
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On paper! In practice Im finding with new tyre (less than 50miles old WTB Raddlers) Peatys cant seal on the go or stay sealed on the go despite tyres being sealed stationary and remaining solid for weeks :-/
Nicholas, thanks for the link. Nice informative vid. I’ve been using Orange seal Endurance on road for many years and find it quite reliable. Did give Muc Off a try and it is so horrible that I threw away the bottle without finishing it. That sealant will not seal any puncture no matter how small with any reliability and the formulation is very difficult to clean off once dried. Have read good things about Peaty’s and need to give it a go once my current Orange Seal bottle is done.
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If you are riding at less than 40psi I’d say ‘don’t’, its too watery to work at lower pressures and whilst it not as messy as muc off its messy too. If you are running above that it seems good and easy to set up/ top up going by it performance on my road bikes.
I’m a roadie so it hopefully will work well for me. Not unhappy with Orange Seal but interested in anything that will work even better
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