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.
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.