BEYEM B-R is a lightweight rainwater-proof one coat mortar for decoration of facades. Formulated with white cement, selected and lightweight aggregates, special additives, and inorganic pigments.
It allows constant hygrometric exchange between the substrate and the environment.
- Suitable for spray render and pump machines or manual applications.
- Good mechanical strengths.
- D.I.T Plus issued by Ietcc.
- Applicable directly to the building enclosure.
- Lightweight. Excellent workability.
- Rough and scraped finishes.
- Rainwater-proof and permeable to water vapour.
- Low maintenance.
- Suitable for internal and external walls.
- New construction and rehabilitation.
- Through-coloured render. Wide range of colours.
Mineral and rainwater-proof one coat mortar for facades, brickwork and concrete block enclosures. Rough and scraped finishes. Suitable for walls and ceilings both in interior and exterior situations, manually or mechanically. Through coloured for low maintenance.
BEYEM B-R is suitable for:
- Brickwork. Ceramic bricks.
- Concrete blocks.
- Concrete (treated with BEYEM UNIÓN MORTEROS adhesion promoter primer).
- Cement based 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. Uneven areas must be corrected. 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.
Do not apply on cellular concrete, gypsum based plasters, paint, plastic, wood or materials with low mechanical properties.
Mix manually of mechanically BEYEM B-R with 5,25-6,25 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.
To apply with render spray machine, it´s necessary to set the relation water/mortar and pump pressure depending on section and length of hose and climatology conditions. It´s important to maintain the variables affecting the properties of the applied mortar (distance to the wall, angle of application and water proportion). Spread the mixed product with a trowel (in case of manually or mechanically application) leaving 12-15 mm of average thickness, after marking the pieces by using PVC splines. Press to ensure adhesion and expel the air contained in the pores. Smooth with a ruler the applied material to regulate thickness. When BEYEM B-R is green (set but not fully hardened) it should be scraped with a circular action using a scarping tool. To avoid changes in tone always carry out this procedure at the same hardening point. Thoroughly brush down the surface of the scraped finish using a soft bristle brush.
- 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.
- Above 15 mm of thickness, apply the product in two layers, leaving a roughness surface in the first to improve the adhesion of the second layer.
- It is not advisable to apply on horizontal or sloped surfaces.
- Protect top edges of facade from rainwater penetration.
- The minimum finishing thickness of render must be 10 mm, to contribute actively to the waterproofing of surface.
- Reinforcement with alkali resistant fiberglass mesh may also be required, dependent upon substrate condition ( junctions of different surfaces, corners of voids…) and project specification.
- Demarcate pieces of work using PVC battens previously placed.
- Expansion joints should be included as required by the substrate and respected by all applied materials.
- It is necessary to use a primer on too high absorption substrates, as a cellular concrete, or on very low absorption substrates.
- Variations in weather conditions during application, and the application in several phases can produce changes in tone.
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Product identity. Properties of mixture and application data |
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Appearance |
Powder |
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Colour |
Colour Chart |
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Bulk density |
≈ 1500 Kg/m3 |
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Density of the mix |
≈ 1750 Kg/m3 |
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% Particles larger than 1 mm |
< 12% |
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Mixing water,% |
± 23% |
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Minimum finishing thickness |
10 mm |
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Maximum layer thickness |
15 mm |
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Coverage |
15 Kg/m2 per cm of thickness |
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Tariff code |
3824.50.90.00 |
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Final performances |
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Type |
OC CSIV Wc 2 |
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Adhesion after weathering cycles |
≥ 0,50 MPa |
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Compressive strength |
≥ 6,0 MPa |
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Shrinkage |
≤ 1 mm/m |
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Capillary water absorption |
≤ 0,2 kg/m2min1/2 |
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Water permeability after weathering cycles |
≤ 1 ml/cm2 , after 48 h |
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Water vapour permeability |
µ < 15 |
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Thermal conductivity |
0,67 W/m·K |
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Reaction to fire |
Euroclass A1 |
BEYEM B-R 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.
Tools can be cleaned easily with water before the product hardens. Hardened product can be remove only mechanically.
Coloured rendered surfaces with scraped or rough finish, must be carried out with lightweight, rainwater-proof, one coat dry mortar compliant with EN 998-1- Class OC CSIV Wc 2, such as Beyem B-R (D.I.T Plus nº 411) manufactured by Rodacal Beyem Company. Coverage will be ≈ 15 kg/m2 per cm of thickness. The substrate must be clean, sound, compact and dimensionally stable. Expansion joints must be respected.
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.
