There’s no way around it – tubeless tyre sealant is messy. It spills easily, spurts out of the valves or seating bead, and sticks to everything. But it’s also worth it, saving you from annoying flats or mid-race, time-costly punctures.
When it works, there’s that split-second oh sh$t moment as you spot the puncture—then relief floods in as the bubbling sealant gets to work before you lose your momentum. But if it fails, you’re either cursing on the side of the road, messily inserting a spare tube or calling for a ride.
