Fireproof masonry mortar TKM

Product description

Fescon Fireproof Masonry Mortar is a special mortar with sodium silicate as the binder and quartz sand as the aggregate, max. grain size 0.5 mm.

  • easy to use
  • heat resistance +1200°C
  • good workability characteristics


  • for laying firebricks in wood-heated fireplaces and fire surfaces indoors
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EAN code Product name Product number Package size
6416841630667 FIREPROOF MASONRY MORTAR TKM 63066 5 kg
6416841530660 FIREPROOF MASONRY MORTAR TKM 53066 25 kg


Refer to the bag for how much water the plaster requires. Add the dry material into the water and mix with a power mixer or a drill paddle for around four to five minutes. Let the plaster stand for around ten minutes and mix it again for a short while. Find the correct consistency at this stage by gradually adding the rest of the water. We do not recommend adding all of the water right at the start. The finished plaster remains workable for several days, if water evaporation from the plaster is prevented.

The lowest working temperature is +5°C. The temperature of the bricks must be above +5°C and the mortar above +10°C. Lay the bricks with ca. 1-2 mm joint thickness.

The plaster binds chemically in room temperature and ceramically at a temperature of around +700°C. Before taking the structure into use, allow it to dry 2-3 weeks with all hatches and dampers open. Perform the first, careful heating with a heater blower, for example. Next 3 to 5 days, heat carefully with a small fire. Leave the hatches and dampers open after each drying heating.

Waste handling

Hardened product and empty, dry packages can be delivered to a landfill. A liquid product must be delivered to a hazardous waste reception point.

Technical information

Material usage

0.25 kg/brick

Water requirement 4.5 - 5.0 l / 25 kg bag
Finished compound 12 - 13 l / 25 kg bag
Type powder
Colour grey
Maximum grain size

0.5 mm


storage time in a dry location approx. 1 year

Lowest usage temperature

+ 5°C

Workability time several days in a closed container
Heat resistance

+ 1200°C


Other links

The information is based on tests and practical experience. We cannot affect conditions at the work site so we cannot assume responsibility for the end result affected by local conditions.


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