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Joint Mortar

Installation and joint mortar

Joint Mortar

Pumpable joint and grouting mortar

Product description

Marlon Joint Mortar is a pre-mixed expanding dry mortar product that is simply mixed with water at the work site. Marlon Joint Mortar comes in the variants 35 MPa, 45 MPa and 60 MPa. These variants also exist in a winter version (see separate data sheet). With its plastic consistency, Marlon Joint Mortar is pumpable and easily mixed in an automatic mixing pump. Marlon Joint Mortar is manufactured from Portland cement, with adhesion-improving, expanding and plasticizing additives. Marlon Joint Mortar contains oven-dried silica sand with a controlled grain curve. The aggregate satisfies the requirements of environmental class E (see DS/EN 206 DK NA:2020). Marlon Joint Mortar is water and frost-resistant in its set state.

  • High-strength pumpable expanding mortar
  • Well-suited for element joints from 3 mm up to 60 mm
  • Contains expanding and adhesion-improving additives
  • Just add water

Marlon Joint Mortar is used for joining and grouting prefabricated concrete elements with both horizontal and vertical joints. For joining corners, concrete element floors and similar tasks.


To ensure the greatest possible adhesion for old concrete, the surface should be cleaned of any cement slurry, dust, oil, grease and other loose impurities Water down the cleaned surface so it is uniform, dull and slightly absorbent, to ensure adequate adhesion of the mortar.


Pour Marlon Joint Mortar in a suitable mixing pump, and add approx. 3.5-3.9 l of cold water per 25 kg of dry powder. The mixing time is min. 5 minutes. Do not mix more mortar than can be used within about 20 min. Marlon Element Joint Mortar can also be mixed in a suitable agitator mixer. Manual mixing can be done with a low-speed drill connected to a two-bladed mixer or by hand-mixing. First pour the water in the tub, then add the dry product and mix thoroughly to achieve a good working consistency.

Pointing of concrete elements

The pre-mixed mortar is pumped directly into the element joint with a suitable pump connection piece in joint thicknesses from 3 mm up to 60 mm wide in the horizontal and/ or vertical joints. The mortar is then pressed into the joint, and the final finish made with the proper tools. Preparation time is approx. 20 min. at +20°C. Lower temperatures prolong, and higher temperatures shorten the opening and hardening times.


Newly grouted joints must be protected from rapid drying due to draught, high temperatures, sun rays, etc. In hot and dry periods, the joint should be watered down. Castings underwater are naturally protected from drying.


Marlon Joint Mortar should not be used at temperatures under +5°C or over +25°C. The product does not tolerate frost during the curing and cementation period.


Clean equipment, machinery and tools with water immediately after use. Hardened Joint Mortar can only be removed mechanically.


Marlon Joint Mortar is subject to internal inspection according to Marlon’s quality assurance system. Subsequent measuring and mixing at the site of application is not included in quality control.

Product information

Marlon Tørmørtel A/S
Virkelyst 20
DK-8740 Brædstrup

Material type
Cement-based, expanding and pumpable joint mortar.

Added water
35 MPa 14-15% of the dry powder weight.
45 MPa 14-15% of the dry powder weight.
60 MPa 15-16% of the dry powder weight.

Environmental class
Joint Mortar 45/60 Extra aggressive

Time open
Approx. 20-25 minutes, depending on the temperature.

Pouring temperature
-5°C til ca. +5°C.

Layer thickness
Guideline, approx. 3-60 mm.

Approx. 13 l per 25 kg.

Filler material
Oven-dried and sorted silica sand, cl. E.

Cement type
Portland cement, CEM I 52.5 N (LA).

Plasticiser, expanding and stabilising additives.

type 25 kg plastic sacks and big bags.

12 months in dry and suited conditions in unopened original packaging.

Technical values 35 MPa 45 MPa 60 MPa Method
Typical internal values cf. EN 196-1 / EN 1015-11 (40 x 40/160 mm prisms)
Compressive strength, 1 day > 10 MPa > 12 MPa > 14 MPa DS/EN 1015-11
Compressive strength, 7 days > 30 MPa > 45 MPa > 54 MPa DS/EN 1015-11
Compressive strength, 28 days > 47 MPa > 53 MPa > 64 MPa DS/EN 1015-11
Bending tensile strength, 28 days > 5.0 MPa > 7.0 MPa > 8.0 MPa DS/EN 1015-11
Expansion of fresh mortar 0.2-0.4 %      
Air content 5%     DS 423.15
Density (wet) Ca. 2100 kg/m3     DS/EN 1015-6
Chromate content < 2 mg/kg cement      
Chloride content 0.01 %     DS/EN 1015-17



Item no. 35 MPa 10230  
DB no. 1461154  
Item no. 45 MPa 10240  
Item no. 60 MPa 10250  
Pr no. 2172448  
Version 07.18 replaces 04.14  



Compressive strength cf. Bulletin no.5  
Performance acc. to DS/EN 206 DK NA:2020 & EN 206-1 Measured on 150 x 300 mm cylinders:
Joint Mortar 35  
Compression strength, 28 days fck > 40 MPa
Correction building site uncertainty fck > 35 MPa
Joint Mortar 45  
Compression strength, 28 days fck > 45 MPa
Correction building site uncertainty fck > 40 MPa
Joint Mortar 60  
Compression strength, 28 days fck > 55 MPa
Correction building site uncertainty fck > 50 MPa