Silca Ultimate Sealant

Silca’s Ultimate Tubeless Sealant with FiberFoam® is a premium, high‑performance tubeless tire sealant engineered to provide industry‑leading puncture protection and durability for road, gravel, and mountain bike tubeless setups. It combines an advanced latex base with reinforcing chopped carbon fibers dispersed in a reactive foam carrier to create exceptionally strong, rapid seals when you encounter sharp objects on your ride.

Why It’s Different:

Unlike many conventional sealants that rely solely on latex particles to patch small holes, the Ultimate Sealant uses FiberFoam® technology — tiny recycled carbon fiber strands (typically 6, 9, and 12 mm) that act like a “fiber dam,” building dense reinforcement over a puncture to stop leaks quickly and reliably. This structure has been shown in testing to seal holes up to ~7.5 mm — significantly larger than many standard sealants — and hold air at riding pressures for extended periods.

Key Features & Benefits

• Advanced FiberFoam® sealing: Carbon fiber reinforced latex foam quickly fills and reinforces punctures for strong, durable seals.
• High puncture tolerance: Effectively seals holes up to about 7.5 mm (larger than many competitors).
• Long‑lasting performance: Designed to remain effective for months in your tire with minimal maintenance.
• Cold‑weather capable: Performs down to roughly 10 °F (–12 °C) for year‑round riding.
• Multiple bottle sizes: Available in various capacities (e.g., 16 oz, 32 oz, 65 ml) to suit single builds or refills.
• Made in the USA: High‑quality formulation developed with rider performance in mind.

Usage Tips

• Pour into tire: Direct pour is recommended to distribute the fiber blend thoroughly at installation.
• Replenish periodically: For best long‑term performance, top off or replenish every ~90–120 days with SILCA’s replenisher product.