FiberLink Tubeless Sealant

What Our Gearhead® Experts Are Saying:

"I ran FiberLink Tubeless Sealant through a full cyclocross season, and it sealed thorn punctures mid-race without any noticeable pressure drop. The low viscosity meant it never felt sluggish in my wheels, and I only needed to top it off once between refresh cycles all season."

FiberLink Tubeless Sealant is built around Finish Line's proprietary FiberLink Technology, pairing a pro latex base with interlinking Kevlar fibers that reinforce a seal the moment a puncture occurs. The fast-acting natural latex cures rapidly on contact with air, minimizing air loss, while the Kevlar fibers add structural strength that helps the seal hold under race pressure and repeated flexing.

Its low viscosity formula flows evenly through tubeless setups without clumping, making it well suited to race day conditions where consistent tire pressure matters. The sealant is compatible across road, gravel, and mountain tire volumes, with dosage scaling from 2 to 3oz for road tires up to 7 to 8oz for fat tires, and CO2 can be used in an emergency, though refreshing sealant soon after is recommended to maintain full effectiveness.

Formulated for optimum longevity between refresh cycles, FiberLink is suited to riders who need dependable, race-day puncture protection without constant maintenance, whether that's a cyclocross tape or a long gravel race where stopping to patch a tire simply isn't an option.