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Silca's Ultimate Tubeless Sealant V2 resets the bar (again) for the Tubeless experience, particularly for road riders. More effective and more durable than the rest, Ultimate sealant uses Fibrefoam tech to reduce hassle and improve performance
Silca's Ultimate Tubeless Sealant V2 resets the bar (again) for the Tubeless experience, particularly for road riders. More effective and more durable than the rest, Ultimate sealant uses Fibrefoam tech to reduce hassle and improve performance
Silca

Silca Ultimate Tubeless Sealant V2 : 500ml

£24.00
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Pre-Order

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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When you purchase this item, you will earn of rewards points to spend on your next purchase from us. You can spend your Rewards balance in-store & online.

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 V2 : 500ml

Season:2025

Brand:Silca

Code:SIAMAC059ASY0101

The new V2 Silca Ultimate sealant has been two-and-a-half years in the making and achieves market leading sealing performance, with longevity and easy maintenance. It's capable of sealing holes up to 6+mm, while its hybrid natural and synthetic latex formula makes it long lasting and injectable, allowing clean top-up.

Silca's sealant has long made use of Fiberfoam® technology, which contains small strand carbon fibres, 400% stiffer than fibreglass, to plug punctures quickly and with minimal air loss.

Once installed, the new V2 formula ensures it will dry-out as fast, staying liquid for up to 6+ months. Moreover, adjustments to the carbon strand length have facilitated injectability, without any sacrifice of sealing power. The formula is also safe with CO2, not losing its effectiveness or coagulating during the inflation process.

The fibre dam created by the carbon fibre on contact with the air, gives fast, effective sealing with minimal air loss, even in extreme conditions, such as temperatures down to -15°c, ensuring this sealant won't let you down.

You can now benefit from reduced fuss and mess, thanks to the sealant's ability to be injected through the valve core for easy replenishment.

Finally, ultimate sealant is not only non-toxic and more environmentally friendly than competitors, but kind to your tyres, as it contains none of the ammonia that can break them down over time.

Key features:

  • Unbeatable sealing power in an injectable, long-lasting formula
  • Fibrefoam® technology forms interlocking “fibre dam” to seal holes up to 6+ mm
    - This is 25% larger than standard sealants
  • Hybrid Latex formula stays liquid for up to 6+ months
  • Natural and synthetic latex blend is durable, fast sealing and non-toxic
  • Injectable via valve for mess-free installation
  • Effective down to -15°C, for year-round reliability
  • Will not coagulate when exposed to CO2 during short term tyre inflation
  • Ammonia free
Available in 65ml, 500ml and 1 litre quantities and useable with the existing replenisher.
  • €28.97
    EUR
  • $39.74
    AUD
  • $35.96
    CAD
  • $44.00
    NZD
  • $25.26
    USD
  • CHF22.68
    CHF
  • kr322.90
    SEK
  • kr3,518.36
    ISK
  • kr216.12
    DKK
  • kr281.59
    NOK
  • ¥3,769.83
    JPY
  • Technical Information
    Fill guide

    Sealant per tyre:

    • 700c tyre:
      • x 28mm, 55ml
      • x 32mm, 65ml
      • x 40mm, 80ml
      • x 42mm, 85ml
      • x 45mm, 90ml
      • x 50mm, 100ml
    • 29er tyre:
      • x 2.0″, 100ml
      • x 2.25″, 115ml
      • x 2.4″, 125ml
      • x 2.6″, 135ml
    • 650b tyre:
      • x 47mm, 90ml
      • x 50mm, 95ml
    • 26″ tyre:
      • x 2″, 95ml
      • x 2.3″, 110ml
    Note: Contains latex, avoid inhalation and wear protective gloves/eye wear during application
    Sizing Information
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