Metal-refining industry, waste, by-productShiny or dull, dark brown to black, irregular particlesMedium performance abrasiveTends to be dusty and shatter on impactLimited use for ultra hi-build coating removalCoal slag will blast off the toughest coatings so you can prepare surfaces right the first time. Achieve consistent, high quality performance that you demand in a coal slag abrasive, Coal slag is tough, clean and economical.