Jahn M70 - Natural Stone Repair Mortar

Engineered to match the physical properties of natural stone such as sandstone and limestone.

M70 Stone Repair Mortar
Description:

Jahn M70 Stone Repair Mortar is a mineral-based, single-component mortar that is supplied ready to mix with water.  Containing no acrylic or latex bonding agents or additives, M70 is completely vapour permeable at any depth. This allows water, water vapour and salts to reach the surface protecting the substrate from failure due to freeze/thaw cycles and salt expansion.

Available in a range of laboratory engineered variants to match the physical properties of the substrate being repaired.

*Jahn M70 may only be purchased by certified installers.

Jahn M70 Natural Stone Repair Mortar is available in a wide range of formulations for the repair of all types of natural stone including:

  • M70 Sandstone Repair Mortar – specially formulated for repairing sandstone
  • M70 Limestone Repair Mortar – specially formulated for repairing limestone
  • M70 Marble Repair Mortar – specially formulated for repairing marble
  • M70 Staircase Repair Mortar – specially formulated for the repair of natural stone steps
Benefits:
  • Engineered in the lab, failure free in the field
  • Single component mixes with water only
  • No synthetic bonding agents – fully vapour permeable
  • Scientifically controlled – no on-site chemistry resulting in product variation
  • Available in a wide range of standard colours. Custom colours available on request. Closely match existing masonry.
  • Laboratory engineered to match the physical properties of existing stone. Ensures that the repair mortar and stone react to the environment in the same way.
Product Specifications

Jahn M70 - Sandstone 0012/100

Specific gravity (kg/dm3)
1.5
Bending/Tensile strength (N/mm2)
1.5 - 2.5
Compression strength (N/mm2)
10.0 - 18.0
Dynamic E-modulus (KN/mm2)
10.0 - 14.0
Water absorption (%)
12.0
Water mixing factor (ml/kg)
190 - 240
Volume mixed mortar (ml/kg)
700
Consumption (kg/dm3)
1.4
Linear expansion coefficient (%)
0.01
Hydraulic expansion coefficient (%)
0.07
Water vapour permeability (my)
20.03
Capillary water absorption (w value)
6.84

*Technical characteristics of other M70 variants are available in the datasheet below.

Jahn M70 - Limestone 0022/200

Specific gravity (kg/dm3)
1.6
Bending/Tensile strength (N/mm2)
2.0 - 4.0
Compression strength (N/mm2)
13.0 - 19.0
Dynamic E-modulus (KN/mm2)
13.5 - 18.0
Water absorption (%)
9.1
Water mixing factor (ml/kg)
180 - 200
Volume mixed mortar (ml/kg)
850
Consumption (kg/dm3)
1.2
Linear expansion coefficient (%)
0.01
Hydraulic expansion coefficient (%)
0.05
Water vapour permeability (my)
35.88
Capillary water absorption (w value)
4.21
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