BRB Siloen® HPA 406

BRB Siloen® HPA 406 is a non-ionic, APEO-free, solventless, water-thinnable, 55% solid aqueous emulsion of a modified polysiloxane.

BRB Siloen® HPA 406 is an additive used in masonry coatings and aqueous primers to enhance water repellency.

• Enhances water repellency and beading effect without reducing water vapor permeability
• Solvent-free
• Suitable for many waterborne paint systems or plasters (e.g., Acrylics, Silicate, Siloxane, etc.)
• Suitable as a water-repellent primer on material substrates as well as a hydrophobing agent for insulating material

• Provides superior hydrophobicity and low water absorption to silicone-based masonry paints and cement-based mortars
• Enhances beading effect and minimizes dirt pick-up
• Improves processability and anti-blocking characteristics in paints

In masonry paints, 1.0% to 5% (typically 2% to 3%) of BRB Siloen® HPA 406 as supplied is recommended, calculated on the total formulation of the paint. It is suitable for silicone resin paints, silicate paints, highly filled emulsion coatings, whitewash emulsions, and interior paints.

BRB Siloen® HPA 406 might be added to the grind before the let-down stage or as a post addition.

BRB Siloen® HPA 406 can also be thinned to 2-5% solids in conjunction with a waterborne polymer dispersion to be used as a water-repellent façade primer.

When used as a water repellent for insulating materials (in-plant treatment of mineral fibers), BRB Siloen® HPA 406 is effective at low concentrations and should be diluted 1:100 parts by weight.

BRB Siloen® HPA 406 can be used as supplied or thinned with water before use. For prolonged storage of the dilution, deionized water is recommended, and additional preservative may be required.

A Product Safety Data Sheet should be obtained from your BRB office prior to use. ATTENTION: Before handling, read product information, safety data sheets, and container labels for safe use and any physical and/or health hazard information.