I've been attempting to use this per the directions and also as advised to me by a local bike shop, and there's no getting around it: trying to use this bottle to top off sealant is a pain. The nozzles jams up frequently with sealant globs, and when it dispenses, it's painfully slow. The worst part is that attempting to refill sealant using this nozzle on this bottle is just plain messy because it dispenses terribly and slowly, so you're fighting both the bottle (e.g., attempting to squeeze it to dispense sealant with any sort of urgency) and also sealant bubbling/popping out of the stem. I give this product one star for the fact that it seems to have similar consistency to another competitor's sealant, and a second star because the bottle provides value simply as a vessel for holding said sealant. Beyond that, look into using some kind of injector with this stuff, and be wary of whether or not this passes the slosh/dipstick test with your tires.

I bought a large bottle of this sealant, hoping for an alternative to the other options. I recently had to re-tape my wheel after getting a spoke replaced and put 3-4 oz of this stuff in my tire as I set it up. The tape job failed, and I had to take the tire back off 10 minutes after dumping in the sealant. To my surprise, there was NO liquid sealant in the tire. It had all dried up. After adding another layer of tape I again dumped 3-4 oz of sealant in the tire and reinflated. The tape job failed again and I had to remove the tire to find that again there was zero liquid sealant in the tire. I started the tape job over with a fresh roll of tape and installed the tire, again pouring another 3-4 oz of sealant in. Concerned that it would dry immediately again I cracked the bead off and found a couple oz of liquid after the 3rd time of adding it in. I don't have a lot of faith that it will have any sealing properties with it drying nearly instantly.

Good price, works well

Works better than Stan’s

I almost always have great experiences with everything I buy from Specialized, so I was pretty bummed to have a not-so-great experience with this Sealant. I've been running another sealant brand for many years without issue, but thought I'd give this is a try. The Good: Install was easy for both sets of tires seating and sealing without incident. The Bad: With 65psi in my Sawtooth (I'm 175lbs) I acquired a small staple that punctured the tire. The sealant did its job at first…That was, until I hit the off road section of my ride. For the next two hours, I was showered with on and off spurts of sealant, in between me putting more air in the tire to keep it inflated (pump, not Co2). Several times, I stopped, let the sealant drain to the hole, where it would temporarily seal, only to begin leaking after a few bumps. When I got home, I topped off sealant and the following day, I went for a 40 mile road ride, and by the end of the ride, my tire was flat. I confirmed there was only one puncture by holding the tire in a bucket of water. To be clear, the puncture size was very narrow (less than 6mm) and did not required the use of a tubeless repair plugger since the diameter of the plug was a lot larger than the actual puncture. Again, we're talking a staple. So, I went ahead and reinstalled the tire using my previous brand of sealant and the puncture sealed immediately and after 150 on/off road and the puncture has not leaked once, and it's holding full pressure. Take two: When I bought this sealant I also installed a set of Roubaixs 2bliss for my road bike and what I found is that it doesn't seem to seal at higher pressures (50+). There are a lot of goat heads where I live, so it's common to get punctures and while the Roubaix would stay inflated, they would stop sealing above 60psi or so. Anyway, perhaps it's an isolated incident but given how much time I've now spent replacing sealant and cleaning dried sealant off my frame, I thought I'd share my experience. Thanks

Truly the best weakest out there for tires. Buy the big bottle and set up your friends. Won't regret it.