Beyem Pro H

Water-repellent aqueous reactive siloxane based emulsion

BEYEM PRO H is a water-repellent aqueous reactive siloxane based emulsion.

Single-component and solvent free. BEYEM PRO H penetrates the substrate bestowing a long-lasting impermeability, whilst allowing vapour diffusion.

  • Pearl effect.
  • Environmentally friendly and respects users’ health.
  • Dilution free: ready for use.
  • Does not yellow due to any atmospheric conditions or ageing.
  • High degree of penetration. Increased durability.
  • Improves thermal insulation.
  • Reduces the appearance of efflorescence.
  • Improves resistance to freeze-thaw cycles.
  • Reduces the penetration of chlorine ions.

Water repellent for surfaces (prevents water absorption) with pearl effect. Efflorescence and de-icing salts controller. By injection, prevents capillary rising damp (horizontal barrier) in bricks, stones and cement-based surfaces. Water repellent in cement mixture and cementitious formulations (maximum 5% by weight of cement). Dust accumulation and dirt absorption reducer. Surface protector, hindering the ageing and degradation of these surfaces due to the atmospheric agents, therefore, facilitating their maintenance and extending their useful life. Interior and exterior application in vertical substrates.

BEYEM PRO H  is  suitable for:

  • Cement-based coatings, facing bricks, one coat mortars, natural stones, masonry, etc …
  • Concrete and concrete blocks.
  • Other absorbent and exposed porous surfaces.

The abovementioned substrates must be sound, clean, free from paint residue, poorly bonded parts or substances which may hinder adherence such as dust, dirt etc… and with sufficient porosity and absorption. All removable parts must be taken away. Surface treatments such as waxes, oils and products for removing formwork must be removed. The substrate must have undergone the drying hygrometric shrinkage and present no signs of humidity.

Shake the drum (can) in order to homogenise the emulsion prior to use. Apply using a roller, brush or dispenser gun. Apply from the top of the substrate to the bottom, taking care that the product does not run off. The application of two successive coasts will be carried out “wet on wet”. The product is applied undiluted. For applications on unspecified substrates, consult the Technical Department.

  • For applications on unspecified substrates, consult the Technical Department.
  • Avoid applying in rainy weather and on damp substrates given that the pores of the substrate are saturated with water and prevent the penetration of the Beyem Pro H.
  • Apply the necessary coasts so as to perfectly cover the pores of the substrate, but avoiding saturation.
  • Do not apply on frozen substrates, whilst in the process of thawing or when there is risk of frost. 
  • Test the product on a small part of the surface to check the absorption and that no colour changes occur.
  • The limestone nature, alkaline pH and compactness of the substrate can hinder the absorption of the product.
  • The duration of the water-repellent treatment will depend on the surface mechanical resistance of the material to be protected against the action of rain.
  • Do not apply below 5ºC or above 35ºC.
  • The use of BEYEM PRO H is not recommended for waterproofing in the presence of hydrostatic pressure, in permanent contact with water or on surfaces below the water table (underground waterproofing).
  • BEYEM PRO H cannot be repainted using conventional paints.
  • Do not use on gypsum walls.
  • BEYEM PRO H does not require special curing, but must be protected from exposure to rain, at least during the first 3 hours after application.

Product identity. Application data.


Water-repellent aqueous reactive siloxane

based emulsion


Whitish liquid


≈ 1020 Kg/m3

Minimum waiting time for protection

3 h


≈ 2-4 mm


≈ 6-10 m2/l

Tariff code


Final performances


Water vapour permeability

It does not alter the µ of the treated substrate

Contact angle

≥ 100 º

BEYEM PRO H is packed in 5 Kg plastic pail.

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.

Water repellent protection of internal and external vertical surfaces such as cement-based claddings, facing bricks, one coat mortars, natural stones, concrete etc. will be carried out using the single component, solvent-free, aqueous reactive siloxane based Beyem Pro H, manufactured by the company Rodacal Beyem. The yield will be ≈ 6.0-10.0 m2/l. The substrate must be clean, moisture-free and free from friable parts.

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 seguridad


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