Following the passing of our good friend and mentor Heinz Jahn, Cathedral Stone Products, Inc. in the USA purchased and maintains the sole ownership rights to the Jahn products and intellectual property.

Therefore, for any enquiries relating to the Jahn M and Jahn S ranges, please visit Cathedral Stone


Jahn M30 Micro Injection Grout is a modified, one-component injection grout for injecting cracks ranging from 0.5mm to 5.0 mm. A small amount of synthetic material is included to enhance flow, penetration and bonding. M30 is supplied ready to mix with water and can be pumped or poured. It may be used in both non-structural and load bearing situations.

For injecting larger cracks and voids please refer to Jahn M35 and M40 Injection mortars.

Injecting constructional cracks from 0.5mm to 5.0mm in brick, natural stone and concrete.

  • Engineered in the lab, proven in the field
  • Single component mixes with water only
  • Contains no leaching or corrosive substances
  • Low viscosity giving deep, thorough penetration
  • Scientifically controlled – no on-site chemistry resulting in product variation
  • Strong adhesion
  • Can be gravity or pressure fed
  • Water Based: Environmentally and user safe – no solvent clean up or disposal problems

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