SILCA Ultimate Tubeless

Had to reseal my mtb tires. Worked great and no flats. This sealant can't be injected. It has a great ability to stop punctures. I'd take it over any other sealant, and will continue to use it

I've been riding tubeless tires for over a decade on my mountain bikes and about 5 years or so on road and gravel. I've tried all the major brands from Stan's to Orange Seal, etc. While those sealants work well too, I've found myself purchasing this Silca offering exclusively in the last few years because it simply delivers and tends to stay in it's liquid form longer than most. Sealant works very well, especially on tubeless gravel and road tires. Because of the particles in the sealant, this has to be poured into the tire rather than "injected" through the valve stem, otherwise it will likely clog the injector or the valve stem. Because it's Silca, you know the quality is there. The product works very well and would recommend highly.

Very easy to set up tires with.

This plugs up your valves if your not careful. I have not had any punctures yet, but I did have to replace a presta valve because the fibers & sealant plugged that hole up pretty well. 2nd valve is okay. when not riding the bike, I make sure the valves are 11 or 1 o'clock to make sure they stay open.

Pure marketing. The worstest product ever. It's hard to make a start filling without getting a mess around. And for refilling you need another. And, as a final, it doesn't work as described - it suffering to deal even with small punctures.

It’s difficult to find any fault with any Silca product, this one has a fault, but they resolved the fault with their new blend. Since I have quite a bit of this on hand, I won’t be trying the new version anytime soon. The long fibers in this blend makes it impossible to fill through the valve stem, but the new blend fixes that. As far as puncture protection, I have over 8,000 miles without a flat running tubeless on Pirelli 30mm tires.

Small holes are sealed quickly but I’ve had cuts that are not sealed and had to insert a tube. Not perfect but better than others I have used.

This sealant is the same good as Cafelattex but with carbon fiber. It could seal my scooter tires like nothing else. The disadvantage is you cannot inject this sealant with syringe cause the fiber pieces are too big for valves.