Compact mortar Heavy M100/600 Winter

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Product description

Fescon Compact mortar Heavy Winter is a cement-based mortar for burnt and sand-lime brick masonry for facades exposed to harsh and extremely harsh winter weather in the temperature range -15°C...+5°C. Especially suitable for coastal sites where structures will have to withstand wind and weathering. Suitable for brickwork repointing and for repairing mortar joints. Contains additives to improve density, weather resistance and workability. 

  • Masonry mortar for sites exposed to extremely harsh weather conditions
  • Extremely low water absorption value
  • Weatherproof
  • Good workability
  • Compressive strength M 5
  • Available in 20 standard colours. Colored products are custom-made products, see delivery terms and conditions
  • Special colours can be tinted to match the project requirements


  • Especially suitable against wind and harsh weather in coastal areas
  • For repointing of brickwork
  • For repairing existing mortar joints
The product is listed in the portal for building products that can be used in Nordic Swan Ecolabelled buildings.
GTIN code Product name Product number Package size
6416841346001 COMPACT MORTAR HEAVY M100/600 WINTER 34600 1000 kg
6416841345318 COMPACT MORTAR HEAVY 39 WINTER 34531 1000 kg
6416841345332 COMPACT MORTAR HEAVY 40 LIME GRAY WINTER 34533 1000 kg
6416841345349 COMPACT MORTAR HEAVY 41 GRAIN YELLOW WINTER 34534 1000 kg
6416841345356 COMPACT MORTAR HEAVY 42 BRICK RED WINTER 34535 1000 kg
6416841345363 COMPACT MORTAR HEAVY 45  EARTH BROWN WINTER 34536 1000 kg
6416841345370 COMPACT MORTAR HEAVY 46 PEAT BROWN WINTER 34537 1000 kg
6416841345387 COMPACT MORTAR HEAVY 48 BLACK GRAY WINTER 34538 1000 kg
6416841345295 COMPACT MORTAR HEAVY 52 LINEN LIGHT WINTER 34539 1000 kg
6416841345783 COMPACT MORTAR HEAVY 44 SAND BROWN WINTER 34578 1000 kg
6416841345905 COMPACT MORTAR HEAVY 71 SWAN WINTER 34590 1000 kg
6416841345462 Compact mortar Heavy 72 Below Winter 34546 1000 kg
6416841345691 COMPACT MORTAR HEAVY 73 CUCKOO WINTER 34569 1000 kg
6416841345844 Compact mortar Heavy 74 Hawk Winter 34584 1000 kg
6416841345004 COMPACT MORTAR HEAVY 75 LARK WINTER 34500 1000 kg
6416841345134 COMPACT MORTAR HEAVY 77 JACKDAW WINTER 34513 1000 kg
6416841345806 COMPACT MORTAR HEAVY 79 PTARMIGAN WINTER 34580 1000 kg
6416841345943 COMPACT MORTAR HEAVY 80  SIBERIAN JAY WINTER 34594 1000 kg
6416841345912 Compact mortar Heavy 81 Teal Winter 34591 1000 kg
6416841345714 Compact mortar Heavy 82 Capercaillie Winter 34571 1000 kg
6416841345929 COMPACT MORTAR HEAVY 83 WILLOW GROUSE WINTER 34592 1000 kg
6416841345790 COMPACT MORTAR HEAVY 85  RAVEN WINTER 34579 1000 kg
6416841345950 Compact mortar Heavy 86 Hazel hen Winter 34595 1000 kg
  • The temperature of the masonry brick or structure is above > 0°C
  • Brick
  • Brick pallets are protected from rain. The bricks must not be wet or covered with snow or ice.
  • Masonry structures are not primed
Mixing and application of the product
  • Masonry work should not be carried out in direct sunlight, in the rain or during strong winds.
  • The working temperature should be between -15°C and +5°C. The joint effect of wind and frost must be taken into account.
  • A bag (25 kg) of dry powder is mixed with 3.7 to 4.2 litres of clean water. 
  • Do not add all the water at first. The mixture contains the correct amount of water when the mortar holds its shape and no water rises to the surface.
  • The amount of water must be as instructed in the product card. Deviating from the recommended amount of water lowers the mortar’s strength properties, increases the risk of separation, affects the strength development and reduces workability. 
  • Product is mixed with a mortar stirrer, in a concrete mixer, or with a pan-mixer or a continuous mixer to a smooth consistency. The maximum mixing time is approx. 10 minutes.
  • If the working conditions are very dry or warm, it is possible to improve the adhesion by dampening the masonry joints or bricks. There should not be water drops on the substrate.  
  • Keep the amount of water the same during jointing, because any variations in the amount of water will show as colour differences in the joint.
  • The jointing technique affects the density of the mortar joint. Finish the jointing by sealing them with a brick jointer and removing any excess mortar from the brickwork by brushing diagonally over the joints with a masonry brush.
  • The expansion joints are provided as defined in the structural plans.
  • The working time of the compact mortar is about 3 hours. 
  • When finished working, wash the tools immediately with water.
  • Remove any dried mortar mechanically.
  • After casting, you should keep the mortar joints moist at temperatures below 0°C by fog spraying for about 3 days, depending on the conditions or the site.
Repointing to a previously masonry joint
  • Available in 20 standard colours. Special colours are subject to order.
  • When repointing, the old mortar must first be removed to a depth of at least 20 mm, but no more than 15% of the masonry depth or according to the designer’s instructions.
  • The joint is cleaned of dust and dampened.
  • When repointing, add the dry powder to the instructed amount of water and let it stand for about 10 minutes. After that, remix the paste and add masonry mortar to make the paste semi-dry. This mixing method ensures the sufficient air content of the mortar.
  • When repointing, start first with vertical joints and after that work with the horizontal ones. Repoints that are over 20 mm are done in two phases.
  • The working time of a semi-dry mortar for repointing is 1 to 2 hours.
  • After casting you should keep the mortar joints moist by fog spraying for about 3 days depending on the conditions or the target.
  • Bases or masonry units with low water absorption are repointed with Repairing plaster KL 1.2 or Facade coating JSP 1.5.
Other points to note
  • Construction planner instructions and official regulations are to be followed in all masonry work.
  • Not suitable for masonry of the inner shells of fireplaces or wood-burning stoves nor masonry of chimney flues indoors.
  • After casting, you should keep the mortar joints moist at temperatures below 0°C by fog spraying for about 3 days, depending on the conditions or the site
  • Masonry mortars may have slight differences in shade between small and big bags, as well as between the mortars intended for winter and summer time masonry, so it is not advisable to change the type of mortar in the middle of the wall.
  • Meets the requirements of Annex 4 of the national standard SFS 7001.
  • Winter products will be available in the winter season, from 15 September to 1 March. At other times, the products must be ordered separately.

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

Water requirement 3.7 - 4.2 l/25 kg
Type powder
Binder cement
Colour available in 20 standard colours. Special colours subject to order
Maximum grain size

2,0 mm

Package size 1000 kg

storage time in a dry location approx. 1 year


additives to improve density, workability and weather resistance, and reduce the freezing point of water

Usage temperature


Workability time 1 h
Compressive strength

M 5

Adhesion strength

≥0,16 N/mm2 (SFS-EN 998-2, 5.4.2 a)

Reaction to fire A1
Heat conductivity 0,77 [w/(m•K)], P=50%
Chloride content < 0,1 % (EN 998-2:2016)
Frost resistance yes
Water absorption by capillarity

0,02 kg/(m2 · min0,5) (EN1015-18)