Leverage The Power Of Recycled Carbon Fiber
SILCA Ultimate Tubeless Sealant uses the power of a foaming latex formula combined with chopped carbon fibers to boost sealing power even at higher pressures. Ultimate Tubeless Sealant contains 5% by volume, 6, 9, and 12mm chopped carbon fibers which have been reclaimed from recycled bicycles, carbon wheels, race cars, and aircraft components.
A unique foaming latex formula allows for the very lightweight carbon fibers to be evenly dispersed within the sealant while riding, which allows for a higher fiber content than possible with Kevlar or fiberglass.
Bundles of recycled carbon fiber are carried directly to the puncture by the sealant flow where thousands of micro-bubbles collapse on each other, depositing their high stiffness carbon fibers over the puncture forming a seal. During this process, the carbon fibers form a dam of fibers against the tire casing not unlike a beaver dam of sticks blocking the flow of a stream. This dam of high stiffness/high strength fibers has been shown to seal holes in testing up to 7.5mm, some 25% larger than conventional sealant technologies.
One thing to note is that Silca's Ultimate Sealant must be poured into the tire during tire install. Because of the high carbon fiber content, Ultimate Tubeless Sealant will plug any syringe or valve hole you try to pump it through.
The sealing power of a race-specific formula with the longevity of long-lasting formulas
Seals up to 25% larger punctures than conventional sealant technology
FiberFoam Technology uses a blend of 6mm, 9mm, and 12mm long carbon
fibers which are 400% stiffer than glass fibers with better dispersion through the sealant
Effective down to 10°F / -12°C
32oz replacement size
B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.
Ordered by Most Relevant First
Seems to be an Excellent Sealant
by Mars Rover
San Diego, CA
Being a new product, there were limited reviews out there. But my go-to product - the CaffeLatex sealant - was out of stock everywhere and I've already tried nearly all of the rest of the sealants out there and not liked various aspects of them: they clot up into rubber marbles (common), they don't seal well (common), or in one case, caused the tire to start weeping sealant (very bizarre). There are definitely a lot of subpar sealants out there that tout themselves as being the best (not). I'm an off-road endurance cyclist (mtb, gravel) now focused on just gravel riding, training, events.
THIS product - the Silca Ultimate Sealant - seems like a good product, and Silca doesn't ever make garbage products. It is a little quirky to install, since the size of its clotting fibers require pouring the liquid into tire vs my usual injecting it via the valve. Easy to make a latex mess when pouring, just requires care and attention to detail.
Performance so far: I'm only 2 months into usage and I have not re-opened the tire to examine for rubber marbles/clots. No leaks so far but no punctures detected, so its sealing performance is unknown. However, no issues with sealant seepage via the sidewalls or leaking around the bead.
We are heading into goathead thorn season in a month, so we'll see how both the tires and sealant handle them.
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