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
127 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 127 reviews
    Total 5 star reviews: 107 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
    127 reviews
    • Oliver K.
      Verified Reviewer
      I recommend this product
      Rated 5 out of 5 stars
      1 week ago
      Really like this!!

      Been using it on 3 bikes for a couple of months and it has worked perfectly so far. Sealed a couple of smaller holes without any issues. This looks like another great product from Silca.

    • Mark R.
      Verified Buyer
      I recommend this product
      Rated 5 out of 5 stars
      1 week ago
      From Stan's to Fiberfoam

      Switched from standard Stan's which is fine on a 4" tire at 8lbs, marginal with 2.25" tires at 25lbs and useless on my 28mm at 65lbs. The Fiberfoam has some chunkiness so should be much better but no holes so far to test it.

    • Paul L.
      Verified Reviewer
      I do not recommend this product
      Rated 1 out of 5 stars
      2 weeks ago
      Terrible mess installing with Tubolight gravel inserts

      I've used Stans and Orange Seal in the past, but decided to try the Silca sealant recently. Silca makes great products across the board, and I was interested in trying Silca sealant for many reasons - Silca's reputation for great products, it's made in the USA, it has environmental benefits (recycled carbon sealant), the reviews I've seen say the sealant works very well, etc. But I was very disappointed with the install, which was a complete disaster for me. I use Tubolight gravel inserts, and using the Silca sealant was an absolute mess. I think the issue is that there isn't enough space between the rim and insert for the Silca sealant to be poured, given that you can't inject it through a valve. It took me hours and I wasted a lot of sealant, using an entire 32 ounce bottle on two wheels due to all the spillage. In the future, I think it would be helpful for Silca to recommend which inserts are problematic for sealant install, to warn people in advance. I could see that it wouldn't be that hard to install the sealant without inserts. And perhaps installation with certain inserts would be easy as well. But in my experience, it's virtually impossible to install the sealant with Tubolight gravel inserts.

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