Silicon carbide (Sic) is the hardest abrasive grain. Silicon carbide has a different shape and different cutting properties than aluminum oxide. It is characteristic that a single grain is sharper and several sharp edges can be used at the same time because the grain is better shaped. At the same time, silicon carbide is more fragile and brittle and cannot withstand high sanding pressure. High pressure crushes the grain and shortens the overall life of the sanding belt. Silicon carbide cuts the material more clearly and gives a better (fiber-free) finishing. Suitable for soft wood intermediate sanding, hard wood finishing, for surface finishing of MDF and other plates.