STAN'S RACE DAY TYRE SEALANT - 1000ML"Simply put, this is the most effective sealant It plugged holes made by a 6mm diameter screwdriver with minimal fuss, only losing 5 psi from the starting pressure of 30 psi, and holding 30 psi after sealing." Bike Radar We spent nearly fifteen years working closely with some of cycling's most successful athletes to formulate the ultimate high performance tyre sealant. Pushing tubeless systems to the absolute limit year after year on the world stage