Valve lapping compound made of silicon carbide is an abrasive paste used in engine repair and valve maintenance to ensure proper sealing between the valve seat and valve face. It consists of a mixture of fine silicon carbide grit (a very hard, sharp material) suspended in a grease-like carrier. The compound is applied between the valve and seat, and through a rotational or back-and-forth motion, it helps remove minor imperfections, creating a smooth, airtight seal.
Silicon carbide, due to its hardness and sharpness, is highly effective for grinding or polishing metal surfaces, making it an ideal choice for lapping tasks where precision and durability are required. Different grit sizes are available for various stages of the lapping process—coarser grits for initial work and finer grits for finishing.
