SILCA Ultimate Tubeless

I've ben running with Stan's in my tires for a while now, and I've been dealing with chronic leaks. Simply put, Stan's regular cannot handle the pressure of road tires. I've got latex all over my bike frame from the futile spewing of sealant as the wheel spins. Stans racing might be better but doesn't last; it's more of a race-day thing.The leaks Stan's couldn't fix are not massive punctures, but I'm on a road bike and I need my tires to hold up to 80 psi.The first time I put the Silca into the rear tire of my commuter bike and pressurized the tire, two leaks immediately popped. Small holes that Stans had never been able to seal at 80 psi. I spun the tire and the leaks were sealed. That was that. I've got miles on the tire now to prove that the leaks are sealed for good.When you pour the goop into your tire you see why you could never use an injector to push the sealant into your tire. There are lumps of bluish fibers are just waiting to clog something.Silca will clog any tool you use to inject the goo into your tires. The great part is that a dose of Silca can last for up to a year with periodic applications of the replenisher, which will work fine with an injector (the replenisher does not include the fibers). With that in mind, you may want to buy a smaller bottle of the sealant than you would other brands.

I've had construction staples and glass punctures seal in one revolution. A roofing nail stuck in. I stopped, pulled it and spun the tire. Leak stopped in about 1.5 revolutions and I was easily able to ride it 2 miles home without topping up tire pressure. Measured pressure was down 15 PSI in a 32mm tire that had been inflated to 62 PSI. Another 2-4mm hole shot sealant out about 24" but sealed itself and held for rest of 20-mile ride on rough roads. Punctures remain sealed for life of tire. In hot, dry, desert weather I need to replenish sealant latex every couple of months. Remarkably better than other sealants I've tried.

Good product

Nasty gunk in sealant and wouldn’t even let me get any into a syringe to put into my tire and jut gooped up and got all clumpy everywhere, would not recommend

Great sealant. This one is not injectable so, get the injectable version if you want the 5-star experience.

Seals like a dream, but it's a bit difficult to first set up as it will clog if you use a syringe

I got out my syringe that I've used before with Stan's tubeless latex with no trouble.I tried to suck the fluid into the syringe from the bottle, but the carbon fibers immediately clogged the hose. So I back flushed the fluid back into the bottle until the syringe was empty.Since I couldn't suck it in, I opened the syringe and poured the liquid into it. When I started pushing the liquid into the tube the fibers again quickly accumulated at the outlet of the syringe and clogged it.I found that by repeatedly pulling the plunger out to clear the clog and then beginning to push again, I was able to get the fluid in over the course of about 10 minutes. (this should have taken about. a minute)Boy is it a pain in the butt to put in. But it's difficult because it seems to be effectively sealing a hole that is probably 3 mm across. (huge). I have no doubt that those pain in the butt carbon fibers will make this stuff seal very very well.

As described and expected.