Sludge Uni-Seal Tyre SealantSeals Tyre Leaks | Tested in AfricaSludge UNI-SEAL and Tubeless are products that contain fibres and cannot be used in any wheel that has a non-removable valve, but can be used in all mountain bikes with tubeless tyres or tubes with removable valves.UNI-SEAL comes in a 200ml bottle which will do two wheels.Tubeless comes in a 100ml bottle which will do one wheel.Cristin Flynn