For those who want to move away from traditional claying methods, the Work Stuff Clay Block is for you. It provides the friction needed to remove brake dust, tree sap, and other stubborn contaminants, leaving behind a smooth as glass finish. unlike traditional detailing clay, the Work Stuff Clay Block can be rinsed off again and again, expanding its lifespan far beyond that of a clay bar. Made in EU. Rinse in warm water before first use.