Boards & Panels

Building with gypsum and fiber cement boards is fast and flexible. To additionally ensure a high quality standard, VINNAPAS^® polymer binders are used to enhance the characteristics of mortars, plasters and joint fillers in these applications. SILRES^® BS silicone resins are ideal for hydrophobization.

Thanks to its favorable carbon footprint, gypsum contributes significantly to sustainable construction. However, gypsum is water-soluble. VINNAPAS^® dispersible polymer powders and SILRES^® BS products help to compensate for this disadvantage.

SILRES^® BS for Fiber Cement Boards

Cement fiber boards, backer boards and fire-resistant boards are treated with SILRES^® BS products to reduce the capillary water absorption by post- or bulk-impregnation.

Benefits

Increased freeze/thaw resistance
Better dimensional stability in wet areas
Prevention of premature drying of plasters, mortars and tile adhesives through optimal water retention
Reduced water absorption of lightweight fillers
Prevention of additional water ingress at cut edges by integral hydrophobization
No paint peeling (siloxane used as primer)

SILRES ^® BS for Gypsum Wallboards and Gypsum Fiberboards

To improve the poor moisture resistance of gypsum, SILRES^® BS polymethylhydrosiloxane emulsions can be used for water-repellent treatment. Thanks to the chemical interaction between the gypsum crystals and the silicone, these materials provide far more efficient protection than organic water repellents.

Enhancing wallboard:

Used as admixture with significant benefits over wax additives (for all wallboard plants)

Enhancing fiberboards:

Surface treatment with excellent hydrophobic properties

VINNAPAS^® and SILRES^® BS for Joint Fillers

VINNAPAS^® dispersible polymer powders are used as binders in gypsum plasters and fillers to improve manual and machine processing, reduce the water uptake and increase the flexibility, making for smooth, crack-free surfaces. Grades without plasticizers support the formulation of low-emission end products.

Benefits

Outstanding tensile adhesive strength on gypsum plasterboard and jointing tapes
Excellent workability
Particularly smooth, level surface devoid of cracks or crevices
Reduced water uptake
Plasticizer-free products available

Reduction in the Water Absorption of a Gypsum Joint Filler

Between x and y weight percent SILRES^® BS POWDER G is added to a commercially available gypsum joint filler (left-hand bar). The test specimens obtained were then immersed in water for two hours. The chart shows how much water by weight percent was absorbed by the test specimens.

SILRES^® BS POWDER G is an additive for waterproofing gypsum-based dry-mix mortars. It is an active substance in solid form and low in volatile organic compounds. SILRES^® BS POWDER G can reduce the water absorption of gypsum powder products by more than 90% applying a dosage rate of 0.5 weight percent.