Extra Coarse

GMA ExtremeBlast™ is our coarsest grade for removing exceptionally resistant specialist coatings, heavy liners, and marine foulings. 


  • Ideal for TSA preparation, coatings for extreme conditions,
    preparing critical components
  • Removal of high build coatings, pliable and flexible coatings
    including coal tar, inner liners and some marine coatings
  • Offshore platform decking, tanks, piping, pressure vessels, ship
    hulls and ballast tanks.


  • Removal of exceptionally resistant specialist coatings, heavy liners & marine foulings
  • Ideal on high build coatings of 30 + mils
  • Uniform surface profile of 3.5 - 4.5 mil (90 - 115 μm) or greater with exceptionally clean surface, enabling remarkable bonding of specialist coatings
  • Blasting rates: Up to 260 ft2/hr
  • Consumption rate : As low as 2 lb/ft2.
Extra Coarse

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