Hydrophobic facade impregnation with silanes and siloxanes
Comparison of capillary water uptake: The untreated substrate absorbs the water droplets (left). Following hydrophobic impregnation of the substrate, the droplets bead off (right).
Building facades are constantly exposed to the elements. Water penetration can, however, have serious consequences: frost damage, efflorescence, and moss or algae growth can, over time, compromise the building fabric and structural integrity. The consequences: costly repairs and renovations. Moreover, damp facades have a negative impact on a building’s energy efficiency.
Hydrophobic impregnation with SILRES® BS provides long-lasting protection against damage caused by moisture penetration to facades of both new and existing buildings. It reduces the capillary water absorption of mineral-based building materials while maintaining water vapor permeability and breathability.
Facade impregnation – challenges and solutions
Typical challenges:
Our solution:
SILRES® BS water-repellent agents penetrate the pores of the substrate and reduce water uptake through the pores. These organosilicone-based agents do not seal the pores and thus maintain the breathability of the substrate. At the same time, water can no longer penetrate the pores because water, as a polar liquid, cannot interact with the non-polar, hydrophobic surface.
Product properties
Silane/siloxane-based emulsions, microemulsions, and creams, dilutable with water or solvents
Advantages::
Applications:
FAQs
What are the benefits of hydrophobic facade impregnation?
Mineral-based building materials such as brick, plaster, or natural stone are porous and absorb water. Moisture penetration can lead to the damage and deterioration of such materials and thus undermine the energy efficiency of a building. Hydrophobic facade impregnation provides long-lasting protection against moisture, reduces maintenance and heating costs, and makes cleaning easier.
What kinds of facade impregnation products are available?
We have film-forming and non-film-forming systems. SILRES® BS is a non-film-forming system: it penetrates deep into the pores of the substrate without blocking them. Unlike film-forming systems, this product maintains water vapor permeability and breathability of the substrate.
How does facade impregnation affect energy efficiency?
Facade impregnation with SILRES® BS prevents the penetration of moisture into the masonry. Dry walls enhance energy efficiency, reduce heating costs, and improve a building’s CO2 footprint in terms of conventional energy sources.
How is a hydrophobic impregnation product applied?
SILRES® BS hydrophobic agents are applied with a brush or sprayed onto the surface. Special SILRES® BS Creme products are available for drip-free application on horizontal, overhead surfaces.