GMA ExtremeBlast GX3 Garnet

Part no. GX34400

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GMA ExtremeBlast is our coarsest grade for the toughest jobs. 


Removal of 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.


  • High 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 280 ft²/hr (26 m²/hr)
  • Consumption rate: 2.5 - 3.5 lb/ft² (12.20 - 17.09 kg/m²)
  • Dust factor:  Low/Medium
  • Recyclability:  4/10
  • Mesh sizes: 16, 36
  • Packaging: 4400lb bulk bag