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Silicon Carbide Magnified 50x Klingspor Abrasives Silicon Carbide is a sharp, very hard, brittle and closed coat abrasive. Best suited for sanding glass, plastics, rubber, ceramics, solid surface and between coats of finish. Also used with some non-ferrous metals, sharpening of alloys, stainless steel and tooling steel. Silicon Carbide is also sometimes referred to as Wet/Dry sandpaper. First made popular in the automobile industry in the early 20th century, SC has been widely used acr …