Beyem Neocal Premix

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

BEYEM NEOCAL PREMIX is a highly  breathable, natural hydraulic lime (NHL)  based premixed mortar for brickwork and masonry works, suitable for both building rehabilitation and new construction.

Formulated with natural hydraulic lime (NHL), natural pozzolan and organic  additives. Allows to use local aggregates to make tailored-fit mortars for rehabilitation and refurbishment works of heritage buildings. 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.
  • Great performance Dosage 1:3 or 1:4.
  • 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) based premixed mortar for stonework, brickwork, wall repairs and masonry works. Suitable for both building rehabilitation and new construction.  Specially designed to be mixed with dry local aggregates for rehabilitation of historic and/or protected buildings due its high compatibility with traditional systems. Suitable in interior and exterior situations.

BEYEM NEOCAL PREMIX is suitable for:

  • Stonework, ceramic bricks, brickwork, and other rehabilitation 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.

Mix manually or mechanically BEYEM NEOCAL PREMIX with 0-2 mm dry aggregates (1:3 or 1:4 rate) with 3,75-4,75 l per each 25 kg batch 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.

  • 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.
  • Beyem Neocal Premix: use dry aggregates with a filler fraction (< 100 µm) content higher than 5%. 

Product identity. Properties of mixture and application data





Bulk density

≈ 700 Kg/m3  (premix)

Density of the mix

≈ 1900-2200 Kg/m3 with 0-2 mm dry aggregate


0-300 µm

Mixing water,% 

≈ [15-19 %]


1:3 or 1:4 dosage with 0-2 mm dry aggregate

Tariff code


Final performances



Premixed mortar EN 998-2

Compressive strength

≥ 7,5 MPa (1:3)  ≥ 5,0 MPa (1:4)

Water absorption

 0,6 Kg/m2min1/2 with dry 0-2 mm aggregate

Water vapor permeability

µ ≤ 15 with dry 0-2 mm aggregate

Reaction to fire

Euroclass A1

Total VOCs (28 days)

< 500 µg/m3

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

I = 0,583

BEYEM NEOCAL PREMIX is packed 15 kg plastic lined paper bags.

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

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

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) premixed mortar compliant with EN 998-2- (compressive strength ≥ 7,5 MPa 1:3 or ≥ 5,0 MPa 1:4 , such as BEYEM NEOCAL PREMIX,  manufactured by Rodacal Beyem Company. The substrate must be clean, sound, compact and dimensionally stable. 

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 sheet

Ficha de seguridadComponent Safety Data Sheet

Factory Production Control Certificate

Deción Compuestos Orgánicos Volátilesde Prestacioneclaras

Certificado Libre de Radiación

Certificado Sistema Gestión de Calidad ISO 9001

Certificado Sistema Gestión de la I+D+i UNE 166002


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