Mortar for tongue-and-groove blocks PHL

Product description

Fescon Mortar for Tongue-and-groove Blocks is a dry mortar for the thin-jointing of lightweight aggregate blocks. The maximum grain size is 1.2 mm. Fescon Stone Adhesive is used for the thin-jointing of sand-lime bricks.


  • Easy to use
  • Good workability characteristics
  • Frost-resistant
  • Low water absorption capacity


  • For thin-joint masonry both indoors and outdoors
The product is suitable for use on sites with a Nordic Swan Ecolabel.

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EAN code Product name Product number Package size
6416841330161 MORTAR FOR TONGUE-AND-GROOVE BLOCKS PHL 33016 500 kg
6416841330192 MORTAR FOR TONGUE-AND-GROOVE BLOCKS PHL 33019 1000 kg



Refer to the bag for how much water the plaster requires. Add the dry material to the water and mix with a concrete mixer for around ten minutes. With a power mixer or a drill paddle, around two to three minutes of mixing is sufficient. Allow the plaster to 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 around three hours.

Work instructions

The lowest working temperature is +5°C. The temperature of the stones must be above 0°C. Follow the instructions of the designers and official regulations in masonry work. National Building Code of Finland B5 and National Building Code of Finland B8, and RYL 2000 instructions.

Waste handling

Storage and handling of waste. See the separate storage and disposal instructions

Technical information

Material usage

0.5 kg/H-75; 1.5 kg/UH-100…UH-150;
2.5 kg/RUH-200…RUH-380

Water requirement 3.5 l / 25 kg bag
Finished compound 13 - 14 l / 25 kg bag
Type powder
Colour grey
Maximum grain size

1.2 mm

Package size 25 kg, 500 kg and 1000 kg

storage time in a dry location approx. 1 year

Lowest usage temperature

+ 5°C

Workability time 3 h
Strength class M 10
Nominal shear resistance

> 0.16 N/mm2 (avg)

Fire class A1
Heat conductivity 0.83 W/mK
Frost resistance Yes
Water vapour permeability

µ 15/35

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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