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Silca Ultimate Tubeless Sealant is set to change the Tubeless experience, particularly for road riders. As effective as the best race sealants and more durable than most, Ultimate sealnt uses Fibrefoam tech to reduce hassle and improve performance
Silca Ultimate Tubeless Sealant is set to change the Tubeless experience, particularly for road riders. As effective as the best race sealants and more durable than most, Ultimate sealnt uses Fibrefoam tech to reduce hassle and improve performance
Silca

Silca Ultimate Tubeless Sealant

£21.00
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With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
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Anxiety-free returns

Returns and exchanges

If you are not completely satisfied with your purchase, simply return the item or items to us in their original condition* within 30 days of receipt. You must notify us in writing within 14 working days of placing your order, by post or email of your intention to do this.

RETURN ADDRESS:

Returns Department
7hundred Ltd
68 Peascod Street
Windsor
SL4 1DE

We will issue a refund, credit or exchange the item for a different size / colour if preferred. Delivery charges are only refundable if you have canceled your entire order within the 7 day Cooling-Off Period or where the goods are faulty and a refund is made.

Store Credit is valid for 2 years and cannot be redeemed for cash at any point.

Where you require an exchange, for example, because a size has been incorrectly ordered, we will make a £4.95 charge or deduct the value from Reward Points where available, to cover re-delivery costs.
(Note: For larger items such as wheels, smart trainers, this charge may vary and you will be informed of the price before the item is sent).

Payment for this must be provided before we will send out the replacement item.

For European and International orders the charge will vary depending on the current cost of delivery to that country. For an accurate price, please contact us before returning your item.

Sorry, we cannot accept returns of books or software where any seals have been broken or working products that have been used.

Please note :

  • The item is your responsibility until it reaches us. For your own protection, we recommend that you send the parcel using a delivery service that insures you for the value of the goods.
  • The cost of returning the item to us is your responsibility.
  • The parcel can take up to 7 working days to be processed once received.

* Note: when trying on items of clothing, please ensure that you are not wearing perfume / aftershave or a deodorant which may leave a scent or marks on the item. In the case of cycling shorts please ensure that underwear is worn when first trying them on. The item(s) must be returned in its original packaging with all labels and tags and with all enclosed documentation.

We will be unable to accept the return of any item where there is evidence that these instructions have not been followed.

For large items such as bikes, trainers and associated large / bulky accessories and wheels, we reserve the right to charge a re-stocking fee of 5% to cover our administration costs.

Faulty Item

If the item you received is faulty, please contact us quoting your order number, your name and address, details of the product and the reason for return, and whether you require a refund or a replacement. We will then advise on how to proceed with the return. You have 30 days from receipt of the faulty item to notify us of your intent to return it and a further 30 days in which to do so.

Incorrect Item

If the item you received is not what you originally ordered, please contact us quoting your order number, your name and address, details of the product and the reason for return, and whether you require a refund or a replacement. We will then advise on how to proceed with the return.

All refunds will be given as soon as possible, and usually take the form of a refund transaction onto the card used for the original purchase. At the very latest we will refund your money within 28 days from the day we receive your returned item. In the case of incorrect ordering and undisclosed reasons for return, a credit or exchange may be issued and the customer will be expected to pay the return postage costs.

All returns must be accompanied by a completed returns form and a copy of the original invoice.



You can submit a returns form here:

Returns Form

Silca Ultimate Tubeless Sealant

Season:2022

Brand:Silca

Code:SIAMAC039ASYWHT

One of the biggest problems our customers face when making the switch to tubeless - and the one that often causes them to return to tubes - is the inability of some sealnts to do their job. This is especially true for tyre widths below 28mm and why we, as a rule, dissuade those new to cycling from switching to tubeless at those widths. The reason for the issues comes down to pressure; narrower tyres requiring more to be rideable. As a consequence, sealant within the tyre is blasted out in the event of a puncture, making it nigh on impossible for it to seal holes.

Silca's new ULTIMATE Tyre Sealant is about to change that

Silca Ultimate Tubeless Sealant combines the power of carbon fibre with a long lasting natural latex formula to achieve sealing properties beyond that of special race day formulas, while matching or exceeding the life expectancy of long-lasting formulas.

The key is a high percentage fill of recycled, chopped carbon fibre strands which are held in suspension by the foaming action of the sealant within the tire. Upon puncture, the sealant rushes to escape the hole, carrying thousands of carbon filaments which serve to dam up the opening, just like sticks of a beaver dam blocking a stream. This dam of fibre collects more fibre and what was one large hole, is now turned into hundreds of smaller holes for the sealant to seal.

Fiberfoam technology has proven to seal up to 7.5mm holes and cuts at gravel pressures and up to 5mm holes at higher road pressures. Even better, the carbon fibre/latex plug formed at the puncture has proven to be more than twice as strong over time as latex only or latex with other additives. After the puncture is sealed, that area of the tyre is left with a zone of carbon fibre 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 fibreglass.

Ultimate seal's superior sealing ability and the hole reinforcing ability of the carbon fibre 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 18°F/ -7°C), as well as longer lasting sealant (7-9months depending on humidity).

While most sealants claim they can plug holes up to 6+mm, they can also be injected into the tyre through the 3mm hole in your valve stem with some injectors using tips as small as 2mm. The power of carbon fibre makes this impossible, Silca Ultimate Tubeless Sealant will instantly plug your injection syringe or your valve as the fibres stack up to block the opening. In solving this issue, the Silca team has developed Ultimate Tubeless Sealant into a system that will save you time and money in the long run.

The initial installation of Silca Ultimate Tubeless Sealant must be done by pouring into the tyre cavity rather than injecting through the valve. However, unlike other sealants which must be completely replaced every 3-6 months, Silca Ultimate Tubeless Sealant has a special Replenisher which can be pumped through the valve and can extend the sealant life to well over 1 year depending on your climate. This means less wasted sealant, and less hassle over time as there is no need to remove the old sealant at each service interval, in many cases, the sealant may outlast the tyre.

  • €24.50
    EUR
  • $33.47
    AUD
  • $29.90
    CAD
  • $36.79
    NZD
  • $21.85
    USD
  • CHF19.99
    CHF
  • kr285.57
    SEK
  • kr3,071.81
    ISK
  • kr182.81
    DKK
  • kr241.24
    NOK
  • ¥3,455.01
    JPY
  • Technical Information

    The sealing power of race specific formulas (6+mm holes) with the longevity of long-lasting formulas (120-180 days)

    • FiberFoam® Technology uses a blend of 6mm, 9mm, and 12mm long carbon fibers which are 400% stiffer than glass fibers with better dispersion in the sealant to bridge punctures for faster sealing with less air loss

    • Must be poured into tire during tire install! Ultimate Sealant will plug any syringe or valve hole you try to pump it through!

    • Effective down to 10°F / -12°C

    • Available in three sizes: 8 oz, 16 oz, and 32 oz

    Silca 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 tyres (Rene Herse for example) during initial install. Some casing tyres 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.

    Ultimate Seal Life

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