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$ 18.00
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Rated 4.7 out of 5
Based on 51 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 the life of these items to be at least 2 years from the date of original purchase.

    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 51 reviews
    • 5 Stars
      46 Reviews
    • 4 Stars
      1 Review
    • 3 Stars
      1 Review
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    92% of reviewers would recommend this product to a friend
    Customer photos and videos
    51 Reviews
    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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    Reviewed by Jamie B.
    Verified Buyer
    I don't recommend this product
    Rated 1 out of 5
    Review posted

    A big miss from Silca

    I like most of my Silca products, but after having used the sealant since it was first launched I can say it is not performing well at all. Reports on WeightWeenies and in a Slack space seem to indicate similar issues from others.

    So far I have seen the carbon fiber either stick to itself in clumps after a few weeks or end up in little balls after 5 weeks (see picture).

    I used it in some tubeless road tires and what was left was a watery blueish liquid and clumps of carbon fiber after about 6 weeks. Would the replenisher fluid have helped? Maybe but I would have had to added it after just a few weeks which seems a bit pointless.

    Maybe this sealant performs well when brand new but based on what I’ve experienced I’ll go back to the devil I know in Orange Seal.

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    SILCA

    We are sorry to hear this experience. We have heard from a few customers with some premature drying that causes these carbon clumps and have installed new bottling lines and modified our recipe slightly to solve these issues. If you reach out to sales@silca.cc we would be happy to get you the corrected option. We have seen some incredible results from the sealing power that hasn't been seen before so we are excited about the future of tubeless sealant!

    Reviewed by Changren Y.
    Verified Buyer
    I don't recommend this product
    Rated 1 out of 5
    Review posted

    Carbon fiber coagulated into pellets

    Less than 6 weeks after installing the sealant - the 8-oz bottle was purchased almost immediately after the product announcement - I unmounted one of the tires to check on the state of the sealant after reading reports from other users of their issues with the Silca sealant. Most of the sealant remained as liquid but a majority of the carbon fiber pieces appeared to have coagulated with something in the sealant, creating pellets that gathered together in three separate lumps. I could not find any evidence of puncture at the locations of the three clusters. There was very little carbon fiber pieces that still existed in its original form in the sealant. I suspect the carbon fiber pieces coagulated into pellets within days after installation - that explained the rattling sound I heard as I spun the wheel - and eventually the rattling kind of died down, which probably meant the pellets had joined together to form these clusters. From reading the reviews posted here, the Silca sealant seems to work great in sealing punctures when it's still "fresh" from install, but my experience tells me this product, as shipped using the exact formula of sealant I purchased on 3/23/22, is not ready.

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    SILCA

    We did experience some bottling issues that led to a higher carbon and latex content than intended in the production process. This caused some issues with a few tire brands that led to what you are experiencing. We are sorry that this happened and if you reach out to sales@silca.cc we would be happy to make sure you get a replacement from our current batch that has these issues solved.
    We are excited to continue to pushing the limits in this category and offering sealing power 2.5x that of the "big" guys.