Mass hydrophobation with Protectosil^® MH 50 and Protectosil^® 851 - efficient and cost-saving too

The absorption of water by capillary suction of concrete is known to be suppressed by standard hydrophobation. In the past, monomeric alkylalkoxysilanes have proven to be particularly effective in achieving this effect. Unfortunately, this standard hydrophobation represents an additional step in the construction of concrete surfaces. This is sometimes not possible due to scheduling, curing of the concrete or other job site restrictions. A silane emulsion that offers the benefi ts of reduced water uptake without an additional step in the construction is Protectosil^® MH 50. This water repellent agent is directly added to the uncured concrete mixture. An homogeneous distribution of the silane ingredient can be easily obtained as the emulsion is sufficiently stable to the high pH of the concrete mixture.

Advantages of mass hydrophobation compared to standard hydrophobation

• reduction of production steps
• no problems with penetration depth
• no dependency on weather conditions

The influence of mass hydrophobation on the concrete properties can be as follows:

Fresh concrete

• reduced viscosity
• unchanged air content
• constant density
• slower concrete reaction (“curing“)

Crosslinked concrete

• slightly reduced resistance to pressure
• major reduction in water uptake

for example "Gundeli multi-storey car park", in Bale (Switzerland) treated with Protectosil® MH 50.

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Protectosil^® MH 50

Protectosil^® MH 50 is a water based emulsion for mass hydrophobation.

Protectosil^® 851

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