Permatex Valve Grinding Compound is a precision abrasive formulation engineered for professional valve seat finishing and lapping operations. This 3oz container delivers consistent cutting action to achieve optimal valve-to-seat contact surfaces on automotive engines. The compound's carefully balanced grit composition removes minor imperfections and corrosion while promoting proper sealing geometry. Ideal for both restoration work and performance engine builds, it ensures reliable combustion chamber integrity and reduces blow-by. Apply with a valve lapping tool for superior results on intake and exhaust valves.