Beyem Proof

One-component, cement-based, polymer modified mortar for concrete surface protection and waterproofing.

BEYEM PROOF is a one-component, cement based, polymer modified high strength mortar for concrete surface protection and waterproofing. Formulated with special cements, selected aggregates, organic additives and resins to improve adhesion and waterproofing. Specially suitable for  containing water. Approved for potable water contact. Sea-water and sulphate resistant.

  • Modified polymer mortar (PCC).
  • High mechanical strengths. Excellent  adhesion.
  • Waterproof up to 1,2 atm of pressure positive lift.
  • Suitable for pump machines and manual applications.
  • Waterproof and permeable to water vapour. Fast hardening without cracking.
  • Both internal and external use.
  • Sea-water and sulphate resistant.
  • Great plasticity.  

Concrete surface protection according to the MC and RI principles: Moisture Control (MC) by surface coating and Increasing Resistivity (IR) by limiting moisture content. Waterproofing of foundations, basement walls, cellars, concrete slabs, walls, tanks, swimming pools, cellars, planters, lift pits, balconies, terraces, bathrooms, showers… Protection of buildings against water damage. 

BEYEM PROOF  is suitable for:

  • Concrete 
  • Cement based substrates
  • Rendering and plastering mortar
  • BEYEM’s concrete repair mortars. 

Concrete must be free from dust, loose material, surface contamination and materials which reduce  bond or prevent suction or wetting  by repair materials. Where necessary, concrete  must be cleaned by sandblasting, high pressure water jetting or other approved mechanical methods that do not cause vibration or impact, to leave a clean and keyed surface.  Absorbent substrates should be previously wetted until they are saturated, preventing waterlogging, and applying the mortar  once the surface has a matt appearance. Smooth, slightly absorbent or very damaged substrates should be treated to obtain a surface with minimum guarantees of roughness and tensile strength. For more information regarding substrate preparation, refer to the recommendations provided in EN 1504-10.

Mix manually or mechanically BEYEM PROOF with  4,75-5,75 l per bag of clean water until a homogeneous,   and lump-free paste is obtained.  Let the mix stand for 5 minutes before application. Apply a minimum of 2 layers  by spray render or by hand (using a trowel). The first layer should be apply with a little less consistency to saturate the substrate. Apply the second layer while the first coat is still fresh. If the final thickness must  reach 5 mm, three layers of product should be applied. 

  • Do not apply below 5ºC or above 30ºC.
  • Do not apply when there is risk of frost, rain, strong wind or direct sunlight.
  • Do not add water in excess of the recommended dosage .
  • Waterproofing of substrates that can undergo small movements or with little cracks, must be carry out with BEYEM PROOF FLEXIBLE.
  • Critical areas  as fillen joints between vertical and horizontal  elements must be treated with a dry mortar to minimize the application angle of BEYEM PROOF.
  • Apply preferably on the positive side, that is, on the one that receives the water pressure.
  • Applied on negative side, there are risk of detachment if  water pressure is higher than adhesion of material. 
  • Protect the mortar applied of early dehydration, using suitable  curing methods. The curing operation in humid environment is essential for at least 24 hours after application.
  • Do not apply on gypsum, metal or wood.
  • Mix only sufficient material that can be applied  using available labour and equipment.
  • BEYEM PROOF must cure for a minimum of  3-7 days before receiving mechanical loads.
  • Water pressure loadable after 7-14 days. 

Product identity. Properties of mixture and application data






0-800 µm

Density of the mix

≈ 1860 Kg/m3

Mixing water,% 

± 21 %

Maximum  application thickness

2-5 mm



              2 mm thickness (without water pressure)

≈ 3 Kg/m2

              5 mm thickness (with water pressure)

≈ 6 Kg/m2

Tariff code


Final performances



Surface protection  mortar for  concrete EN 1504-2

Bond strength

≥ 1,0 MPa

Compressive  strength

≥ 30,0 MPa 

Capillary absorption and permeability to water

W < 0,1 kg/m2h1/2

Water vapour permeability

Class l: SD < 5 m

Reaction to fire

Euroclass A1


BEYEM PROOF 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 removed only mechanically.

Surface protection of concrete and waterproofing must be carried out with  one-component, cement based, polymer modified high strength mortar, compliant with EN 1504-2 and according to Principle 2, method 2.2 and  Principle 8, method 8.2 of  EN 1504-9, such as Beyem Proof, manufactured by Rodacal Beyem Company. Coverage will be  ≈ 1,5 kg / m2 per mm of thickness.

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

Component Safety Data Sheet

Declaration of benefits

Factory Production Control Certificate

Certificado Sistema Gestión de Calidad ISO 9001

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


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