Ultimate Tubeless Sealant w/FIBERFOAM
Ultimate Tubeless Sealant w/FIBERFOAM
Ultimate Tubeless Sealant w/FIBERFOAM
Ultimate Tubeless Sealant w/FIBERFOAM
Ultimate Tubeless Sealant w/FIBERFOAM
Ultimate Tubeless Sealant w/FIBERFOAM
Ultimate Tubeless Sealant w/FIBERFOAM
Ultimate Tubeless Sealant w/FIBERFOAM
Ultimate Tubeless Sealant w/FIBERFOAM

Ultimate Tubeless Sealant w/FIBERFOAM

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Regular price$ 42.00
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Rated 4.7 out of 5
Based on 58 reviews

Ultimate Tubeless Sealant uses FiberFoam® technology to harness the power of carbon fiber to seal up to 7mm punctures without losing pressure. Get it while supplies last.

• Effective down to 10F/ -12C
• Seals 7.5mm holes for up to 6mo
• Must be poured into tire during install
• Not injector compatible (It seals holes bigger than
your valve)
• Use Replenisher every 90-120 days for best
performance
• 6, 9, and 12mm recycled carbon fibers are dispersed evenly by a foaming latex to create ultra strong seals
• Made in the USA

Limited Warranty

SILCA LIMITED WARRANTY 

Parts covered by SILCA Limited Warranty are considered to be subject to wear through normal use or are consumable subject to degradation through the course of their daily use.  SILCA guarantees them free from manufacturer defects for 2 years.

    Installation Instructions 

    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, racecars, 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. At this high fiber loading, bundles of 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 hole. 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 technologies.

    After the puncture is sealed, that area of the tire is left with a zone of carbon fiber reinforced latex bridging the top and bottom of the hole, helping to reduce the likelihood of future punctures in that area when compared to other sealant additives such as cornmeal, glitter, or fiberglass.

    This superior sealing ability and hole reinforcing ability of the carbon fiber also allows for a higher concentration of anti-freeze agents in the sealant which means more effective sealing at low temperatures (6mm holes seal at 18deg F/ -7deg C), as well as longer lasting sealant (7-9months depending on humidity).

    We recommend adding replenisher every 90-120 days depending on temperature and humidity where you live (see chart) to rejuvenate the sealant. Replenisher can also be used to replenish sealant on very porous tires during initial install. Some casing tires are very porous and will experience weeping of sealant throughout the casing sidewalls. Testing shows that weeping sidewalls can reduce sealant volume by 30% during the install, while also accelerating the aging of the sealant. Adding 30-50% of sealant volume back with the replenisher can ensure optimum performance and maximum life.

    Tires with extra-light casing can experience high amounts of weeping.  We have seen this with tires from Rene Herse and Teravail among others.  The extremely porous side walls will soak up a sealant causing premature drying.  To account for this add either an extra oz of sealant or once the tire is mounted, inject an ounce of replenisher. 

    CO2, condensation from compressors, and talc powder can lead to hardening of the sealant.  These should be avoided when installing the sealant.

    average rating 4.7 out of 5
    Based on 58 reviews
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    93% of reviewers would recommend this product to a friend
    Customer photos and videos
    58 Reviews
    Reviewed by Changren Y.
    Verified Buyer
    I recommend this product
    Rated 4 out of 5
    Review posted

    Updated review

    I was quite critical of the initial batches of the Silca ultimate tubeless sealant because like quite a few other users, the carbon fiber pieces eventually formed several large clumps of carbon fiber balls. In August last year, I thoroughly cleaned my Schwalbe Pro One TLE tire and Enve 4.5 AR rim before mounting the tire on the rim. I added about 2 oz of the Silca sealant with Fiberfoam. In early November, I injected about 1 oz of the Silca sealant replenisher prior to a 1-month trip to the tropical Singapore and Malaysia. During that trip, I had four punctures, all successfully sealed by the Silca sealant. Other than one puncture that lost about 20 PSI and required a mid-ride inflation, the sealant plugged the other three punctures with negligible tire pressure loss. I know the exact tire pressure because I have the Quarq TyreWiz tire pressure monitor installed.

    Recently I have an issue with the rear hub of my Enve wheel that requires the wheel be shipped back to Enve for service. So that presented an opportunity to examine the Silca sealant in that wheel. Upon dismounting the tire - almost three months after adding the replenisher - there appeared to be sufficient sealant to perhaps last a couple more months. There was zero sign of carbon fiber balls so the initial bottling issue that caused this appears to have been resolved.

    So far, with the Silca ultimate tubeless sealant, even those initial batches that had a tendency to form carbon fiber balls, I have not had a…

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    Reviewed by Louis P.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5
    Review posted

    Best on the market

    I have tried em all and this stuff just works.

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    Reviewed by Stefan M.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5
    Review posted

    Works great, I think.

    I haven't had a flat yet, so I've been really lucky or this stuff is amazing.

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