What Our Gearhead® Experts Are Saying:"I’ve trusted Silca’s Ultimate Tubeless Sealant on rough gravel rides and never looked back. The FiberFoam tech works wonders, sealing significant punctures quickly, so I can focus on the trail without worrying about flats."Flat tires don’t belong on our bucket list of worries, so we rely on Silca’s Ultimate Tubeless Sealant to keep our rides rolling. With its innovative FiberFoam technology, this sealant uses carbon fiber particles to seal punctures up to 7mm in size, ensuring we can tackle rugged terrain without hesitation. Its foaming latex formula spreads evenly inside our tires, creating a secure seal without losing air pressure. From long gravel routes to technical trails, this sealant lets us ride with confidence, knowing our wheels are as prepared as we are for any adventure.