Gypsum - Wacker Chemie AG


Little Material Consumption, Large Effect

Thanks to its favorable carbon footprint, gypsum contributes significantly to sustainable construction; it is one of the most universally used construction materials and its application range is continuously expanding. However, a key disadvantage lies in the material itself: gypsum is water-soluble. That’s why gypsum products that find application in rooms with high humidity, such as bathrooms, kitchens, garages or basements, must be rendered water-repellent.

To this end, gypsum plasters and fillers are modified with suitable VINNAPAS® dispersible polymer powders. WACKER’s dispersible polymer powders improve manual and machine processing, increase flexibility, reduce water uptake (VINNAPAS® H) and make for smooth, crack-free surfaces.

Specifically for gypsum-based dry-mix mortars, WACKER recently developed an innovative product that offers users an entirely new technology: SILRES® BS POWDER S. The powdery water-repellent additive is purely based on an active substance and thus simplifies production of gypsum-based products. At the same time, it optimizes the end product’s quality and durability. In general, a very low dosage of SILRES® BS products, such as SILRES® BS POWDER S, is sufficient to reduce the water uptake of gypsum products by well over 90%.


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Products Application
Product Group
Product Type
SILRES® BS 16 Gypsum ApplicationsSiliconatesWater-repellent agentHydropobic
SILRES® BS 46 Gypsum ApplicationsSilicone Fluid EmulsionsWater-repellent additiveHydropobic
SILRES® BS POWDER A CoatingsSilanesWater-repellent additiveHydropobic
SILRES® BS POWDER G Gypsum ApplicationsSilanesWater-repellent additiveHydropobic