Manta WS290 Silanes and modified polysiloxanes

Manta WS290 is a solvent-free, 100% active concentrate composed of silanes and highly modified polysiloxanes. It is engineered to be diluted with organic solvents, functioning as an exceptional water-repellent impregnator and primer for mineral substrates.

Equivalent to: Wacker SILRES® BS 290

Properties

• Exceptional Hydrophobicity: Delivers outstanding initial and long-term water repellency.
• Highly Breathable: Maintains uncompromised water vapor permeability, allowing the substrate to “breathe”.
• Pronounced Beading Effect: Imparts an excellent surface water-droplet roll-off (lotus) effect.
• Deep Penetration: Low molecular weight enables high penetrating power into dense mineral matrices.
• Aesthetic Preservation: Significantly reduces dirt pick-up (stain resistance) and effectively prevents surface efflorescence.

Manta WS290 is an ideal high-concentration base for the production of solvent-borne penetrating water repellents and primers. It is highly suitable for:

1. Clay bricks, sand-lime bricks, and natural stone.
2. Exposed concrete and mineral-based plasters/renders.
3. Functioning as a high-performance hydrophobic primer for exterior acrylic or silicone resin paints.

Application Guidelines

• Dilution Requirement: Due to its 100% active concentration, WS290 must be diluted prior to application. Depending on the substrate’s porosity, dilute at a ratio of 1:9 to 1:14 by weight.
• Suitable Solvents: Highly miscible with aliphatic or aromatic hydrocarbon solvents, as well as dearomatized isoparaffins (e.g., D40).
• Application Technique: Apply the diluted solution liberally and evenly to the absorbent surface using a brush, roller, or the flooding method. A wet-on-wet application is recommended for maximum penetration.
• Substrate Tolerance: Uniquely formulated to perform effectively even on slightly damp or highly alkaline building materials.