Sealey Aluminium Silicate Blasting Media 0.20 0.50mm ASM25KGGeneral purpose abrasive, can be used on a wide variety of materials including ferrous metals, wood, stone and brickwork. It leaves less of a dark residue when blasting compared to other blast media. ALUMINIUM SILICATE General purpose abrasive. GENERAL PURPOSE Can be used on a wide variety of materials. SOFTER MATERIALS Highly recommended for wood, stone and ferrous metals. LOW RESIDUE Lighter media therefore leaves less of a dark residue. SINGLE USE