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

Size
Regular price $ 18.00 Sale price$ 12.00 Save 33%
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4.7
Rated 4.7 out of 5 stars
130 Reviews

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

• Effective down to 10F/ -12C
• Seals up to 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.

    NOTE: Tires with extra-light casings can experience high amounts of weeping.  We have seen this with tires from Rene Herse, Veloflex, 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.

    For best results we recommend using Tensilyzed Polypropylene (TPP) rim tapes such as those sold by Stan's, Joe's, 3M, Tessa, and others.  These are generally opaque tapes without printing on them and are much stronger and more abrasion resistant than vinyl based tapes.

    4.7
    Rated 4.7 out of 5 stars
    Based on 130 reviews
    Total 5 star reviews: 110 Total 4 star reviews: 11 Total 3 star reviews: 2 Total 2 star reviews: 2 Total 1 star reviews: 5
    93%would recommend this product
    130 reviews
    • Eric C.
      Verified Buyer
      I recommend this product
      Rated 5 out of 5 stars
      Yesterday
      It just works

      I am very impressed with the effectiveness of Silca Sealant. A few days ago, I got home with a giant thorn in my road bike tire; the tire was still holding air. I took the thorn out, gave the wheel a spin, and the whole sealed up.

      The only downside is that the sealant cannot be injected through the valve. I won't use anything else on road or gravel, though.

    • Eric F.
      Verified Buyer
      I recommend this product
      Rated 5 out of 5 stars
      6 days ago
      Almost too good at sealing!

      This stuff seals better than any other product. But because of that it can clog valves somewhat, so keep a valve core remover handy to open it up and clean it out with a spoke or similar tool.

    • Florian S.
      Verified Reviewer
      I recommend this product
      Rated 5 out of 5 stars
      1 week ago
      Just don't bother with anything else - this is the best. ever.

      Having tried a plethora of brand - the pink one, the blue one, the orange one... None of those has been without its issues. SILCA Ultimate is FLAWLESS. Even tricky tires like Vittoria Corsa seal up straight away, and will hold air way better than anything else. The opportunity to "top up" the sealant is just genius and works a treat. I have had ZERO failures so far.

      Once again, see title - don't bother with anything else.

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