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Beyem Neocal Mur

Beyem Neocal Mur

Breathable, hydraulic lime mortar for masonry works. Natural composition.

About this product

BEYEM NEOCAL MUR is a highly  breathable natural hydraulic lime (NHL)  mortar for brickwork and masonry works,   suitable for both building rehabilitation and new construction. Formulated with natural hydraulic lime (NHL), natural pozzolan,  selected aggregates and organic  additives.

BEYEM NEOCAL MUR has a natural composition and is specially suitable for rehabilitation of historic and/or protected buildings (old masonry walls).  Free of Portland cement. Indoor environment quality. Classifed as  A+ class according to Décret nº. 2011-321 (France). Free of radionuclides.

  • Mechanical strengths corresponding to lime mortars.
  • High water vapour permeability. Allows the wall to breathe.
  • Great plasticity. Excellent  adhesion.
  • Compatible with old masonry brickworks/walls.
  • Extended workability time  and adjustment of pieces.
  • Excellent finishing.
  • Free of chlorides.
  • Suitable for internal or external works.
  • New construction and building rehabilitation.
  • Natural bacteriostatic and natural fungistatic.
  • Very low VOCs  emissions.
  • Radiation-free certificate.
  • Mineral product.

Natural hydraulic lime (NHL) mortar for stonework, brickwork, wall repairs and other masonry works. Suitable for both building rehabilitation and new construction.

Especially suitable for rehabilitation of historic and/or protected buildings (old masonry walls) due its high compatibility with traditional systems Suitable in interior and exterior situations. 


BEYEM NEOCAL MUR is suitable for:

  • Stonework, ceramic bricks, brickwork, and other rehabilitation substrates. 
Preparation of substrates

Substrates must be clean, compact and free of substances that reduce adhesion such as dust, oil, grease and with no loose material. Substrates must submit an adequate porosity and surface roughness. Dampen substrates with water to cool down if they should be too warm, in case of wind or over absorbent substrates and wait until the thin layer of water disappears. It is a good practice curing with a fine spray of clean water 24 h after application. Curing operation is essential to avoid  rapid drying and depends on the degree of porosity and surface absorption.

Do not apply on cellular concrete, gypsum-based plasters, paint, metal surfaces, plastic, surface waterproofing products or materials with low mechanical properties.

Instructions for use

Mix manually or mechanically BEYEM NEOCAL MUR with 4,5-5,0 l per bag of clean water until a homogeneous, creamy and lump-free paste is obtained. Let the mix stand for 5 minutes before application.

Spread the mixed product with a trowel onto the substrate. Place the brick over the fresh mortar layer and press to ensure adhesion. Smooth with the same trowel.

Cautions and recommendations
  • Always mix with the specified amount of water.
  • Do not apply below 5ºC or above 30ºC.
  • Do not apply when there is risk of frost, rain, strong wind or direct sunlight.
  • Under extreme weather conditions (gusty winds or high temperatures) drying may occur faster than usual.
  • For renovation/refurbishment works, substrates must be completely cleaned before product application, removing any salts and materials from previous works.
  • Never re-mix the product once it has started to set because this causes a decrease in the properties of the mortar.
Technical data

Product identity. Properties of mixture and application data





Bulk density

≈ 1250 Kg/m3

Density of the mix

≈ 2000 Kg/m3


0-2 mm

Mixing water,% 

± 17 %


According to use

Tariff code


Final performances



G (Prescribed mortar)

Compressive strength

≥ 7,5 MPa

Water absorption

 0,5 Kg/m2min1/2

Water vapor permeability

µ ≤ 15

Thermal conductivity

0,96 W/m·K

Reaction to fire

Euroclass A1

Total VOCs (28 days)

< 500 µg/m3

Radioactivity index (U, Ra, Pb, Th, others)

I = 0,195


BEYEM NEOCAL MUR is packed 25 kg plastic lined paper bags.

Storage: when stored unopened in a cool dry place, shelf life is 12 months from date of manufacture.

Cleaning tools

Tools can be cleaned easily with water before the product hardens. Hardened product can be removed only mechanically.

Project specification

Stonework construction and  rehabilitation of historic and/or protected buildings  must be carried out with COVs and radiation free,  highly  breathable, Portland cement free and natural hydraulic lime (NHL) mortar compliant with EN 998-2- Class G (compressive strength ≥ 7,5 MPa), such as BEYEM NEOCAL MUR manufactured by Rodacal Beyem Company. The substrate must be clean, sound, compact and dimensionally stable. 

Health and Safety

For further and complete information about the safe use of our product please refer to our latest version of the Safety Data Sheet, which is available upon request.

Disposal of the product and packaging must be in accordance with current legislation. This is responsibility of the final product user.


Technical Data Sheet

Safety Data Sheet

Declaration of Performance

Certificate of Factory Production Control

Declaración Compuestos Orgánicos Volátiles

Radiation-Free Certificate

Certificate of Quality Management System ISO 9001

Certificate of R+D+i Management System UNE 166002

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