For the hydrophobing of mineral systems, hydrophobing agents based on silicone chemicals have proven their worth in the field of construction chemistry
for many years. These hydrophobing agents can either be applied subsequently to the surface or used as bulk hydrophobing agents directly in the mineral system.
The basis for most hydrophobing agents based on silicone chemicals are special silanes
that carry a hydrophobic alkyl function. These silanes are applied either diluted in solvents or as an aqueous emulsion on the surface or for bulk hydrophobing.
To further improve the hydrophobic properties, siloxanes and/or silicone resins are used in addition to the silanes
in the hydrophobing agents. These can also be applied subsequently on the surface or in bulk. The improved products are available undiluted or as aqueous emulsion. Some products are used, among others, for horizontal barriers and have WTA approval.
Hydrogen-functional siloxanes are very reactive hydrophobing agents. These can only be used in the industrial production of, for example, concrete components in bulk. Due to the reactivity, the products are not suitable for craft processing. They are available undiluted or as aqueous emulsion.