JOHNEX MIGHTY ATOM is a high density 75g supersonic velocity primer consisting of pentolite which provides the ultimate in primer performance. The JOHNEX MIGHTY ATOM provides directional firing with 4 times the detonation pressure of cartridged emulsion.


Commonly used in underground development headings and in small diameter boreholes in open pit blasting to initiate emulsions or bulk ANFO. The JOHNEX MIGHTY ATOM is compatible with No. 8 strength detonators.


  • Unique lock in capwell provides a totally safe protected environment for the detonator
  • Supersonic VOD increases performance of ANFO and emulsions at the butt where it is needed
  • Detonation pressure. Pentolite formulation produces 4 times higher detonation pressure than cartridge emulsion & increases the blast advance by 10% on average
  • Directional Firing. Designed to eliminate butts by focusing the shockwave towards the butt.
  • User Friendly. Specialised custom shape saves time when charging
  • Deadpress. Unlike emulsion cartridges, deadpress is totally eliminated
  • Locking Mechanism. Positive detonator locking mechanism ensures correct location and retention of the detonator
  • 100% water resistant