Flat Out Off Road Tire Sealant, Sportsman Formula, Prevents Flat Tires, Fix a Flat Tire, Seals Leaks, Contains Kevlar, 32 Ounce Bag, 4-Pack

This stuff really works! I got a flat from a nail on my 20x4 fat tire ebike that had FlatOut in it already. I pulled the nail, spun the tire and started pumping it up. It was holding air until I spun the tire again but forgot to disconnect my pump and broke the pump. I rode an hour on what little air I was able to fill with before having to walk to the closest fire station where they filled my tire. I was able to ride home a couple more miles after the fill.When I got home, the next day, the tire was flat again. I spun the tire again slowly to get the FlatOut moving in the tube, and added some air. I kept repeating this every 4-5 psi until I got the tire up to 20-22 psi. Tire held that air pressure for the next few days and I've since put over 40 miles on the bike and tire without issue and still holding air.I used 1/4 of the bag I got for each tire...1/2 bag for both tires.

I've got a big, fat tire electric bike that weighs about 80 pounds unloaded.I Started getting flat tires. Having to walk my bike home 5 miles with a flat is not fun.Fixing a big fat tire flat is a slow and time consuming process.Regular bike levers usually won't do the job. I have to use motorcycle tire spoon levers to fix a flat.Its not something I'd want to do on a hot summer day, or in the middle of a downpour, or with sleet and snow hitting me in the face, my hands freezing barely able to hold the tire levers. Changing a flat on a electric bike, the power cable connector has to be disconnected, zip ties holding the power cable have to be cut, or electrical tape holding the cable in place has to be cut.Doing all this in a rain storm could be a very electrifying experience in a bad way.I started looking for a better way, a better solution to prevent flat tires.After watching several YouTube videos about different solutions.I tried the Tannus Armour foam liner, right away I got a flat with that and I still had to walk five miles home with a flat tire. It made rolling my bike on a flat even more difficult.Once home, I had to cut the tire liner with a pair of scissors, just so I could remove the tire liner and pull out the bad inner tube. The tire liners are expensive, and didn’t work for me.I went back to YouTube, watched more videos on how to prevent flat tires.I stumbled upon some YouTube videos about flatout tire sealant.One of the Youtube videos shows a guy using flatout and then putting nails and drilling holes into his bike tire, and the FlatOut sealed the nail punctures and the drill holes.I was so impressed, I bought a couple gallons of flatout. There are different grades of flatout specific to the kind of tire. They have a grade for motorcycle tires that I use on my fat tire bike and a grade for regular sized bikes that I bought for my other bikes.The flatout really works. I'd go through nails, screws, big staples, and glass, get all kinds of punctures, and the flatout sealant would squirt out the holes and I'd just keep my bike going at a nice and steady speed, and the tire would seal.It's important to keep the bike rolling when you're experiencing a flat. It helps the tires seal properly. If you were just to pull over and stop your bike the sealant wont seal as well. So keep on rolling when you get that flat.Sometimes the sealant will get on the fender or the side of the bike. The sealant is non-toxic and is easy to wipe off.I had nine or ten punctures in the tire before I finally decided to put in a fresh inner tube and more flatout.Since using FlatOut, I haven't had to walk my bike home.I wish I had known about this product years ago.

So far so good! Used it on my fat tire commuter bike. Gives me a sense of security knowing I can make it home if I get a puncture in my tire when I'm far from home. Excellent product!

Only complaint is the valve stem removal tool. On both bags they tore and some plastic got stuck in my valve stem. I recommend buying a proper removal tool.

At first I thought it didn’t work but patience is key.

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I live in the country and we have mesquite all over and need a good sealant. This does the trick

I decided to try Flat Out because using other products means re-adding sealant at least every year. The promise is that you never have to change it. That sounded good to me. I have a tire with a slow leak and decided to try Flat Out on it. It's a standard 29 inch bike tire, not fat or plus size.First of all, there are no instructions for how much to use in a bike tire. With Stans sealant I can get away with 2 oz or maybe 4 oz to be really safe. I started with 4 oz of FlatOut which made the tire actually usable (before it wouldn't hold air for more than an hour). However, after about half a day the tire is noticeably going flat. I can see seepage of sealant along the side walls along with tiny bubbles. I thought it was supposed to seal leaks?Tried adding another 2 ounces for a total of 6 now. Also rotated, rode, and shook the tire to make sure the sealant was distributed. Still bubbling and seeping along the sidewalls. Still won't hold air.In short, while the leak has been slowed, FlatOut did not make the tire hold air. The fact that I can see it bubbling out tells me that it's distributed enough to cover the leaky area, it just doesn't work. Maybe it only works for actual punctures. All I know is that it doesn't work for me.