JOHNEX MIGHTYPRIME® is a high density
supersonic velocity primer consisting of
pentolite which provides the ultimate in primer performance. JOHNEX MIGHTYPRIME®
provides directional firing with four times the
detonating pressure of cartridged emulsion.


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

Features and Benefits

  • 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 7% 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