Silca Ultimate Tubeless Sealant V2 - 500ml Silca Ultimate Tubeless Sealant V2 - 500ml has been developed over two-and-a-half years to deliver market-leading sealing performance with outstanding longevity and easy maintenance. Capable of sealing holes up to 6mm, its hybrid natural and synthetic latex formula provides a long-lasting, injectable solution for clean and efficient top-ups. Silca's sealant incorporates Fiberfoam technology, using small carbon fibre strands that are 400% stiffer than fibreglass to rapidly plug punctures with minimal air loss. The latest formula remains liquid for up to six months, drying more slowly while maintaining its exceptional sealing power. Adjustments to the carbon strand length have enhanced injectability without sacrificing performance. The formula is also CO2 safe, ensuring it remains effective and does not coagulate during inflation. The carbon fibre-reinforced seal forms a strong, airtight barrier, performing reliably even in extreme temperatures as low as -15°C. Mechanics will appreciate the reduced labour time for installation and the ability to inject sealant through the valve core for quick and hassle-free replenishment. Ultimate Sealant is non-toxic, environmentally friendly, and free from ammonia, helping to prevent long-term tyre degradation.