SILCA Ultimate Tubeless Sealant 1L is a one-step, long-lasting sealant that combines natural and synthetic latex with optimized carbon strands and advanced foaming agents to quickly carry fibers into punctures and seal holes 6mm and larger. Updated from the original race-focused formula, it remains injectable through the valve for clean, convenient installation while addressing previous drying and injection issues so casual riders and racers alike get reliable, low-maintenance protection.