Prosoco Siloxane WB Concentrate

Description and use

Sure Klean® Weather Seal Siloxane WB concentrate is a self-emulsifying water repellent concentrate designed for dilution with fresh water at the jobsite. This solvent-free blend of silanes and oligomeric alkoxysiloxanes mixes easily with water to produce a penetrating water repellent ideal for application to dense or porous masonry surfaces. Weather Seal Siloxane WB can also be used as a primer to even out porosity and improve adhesion of BMC® Breathable Masonry Coatings. Weather Seal Siloxane WB complies with all known regulations limiting Volatile Organic Compound (VOC) content. An effective alternative to conventional solvent-based silanes or siloxanes, Weather Seal Siloxane WB penetrates and chemically bonds deep within the masonry substrate to provide long-lasting protection against water-related staining or deterioration. Will not darken, produce a surface film or impair the natural breathing characteristics of treated surfaces.


  • VOC compliant — contains no organic solvent.

  • Concentrate— minimizes storage, transport and container disposal requirements.

  • Mix with up to 19 parts fresh water. One gallon concentrate treats up to 4000 square feet.*

  • Alkaline stable — suitable for new concrete.

  • Penetrates deeply — effective on vertical or horizontal surfaces.

  • Ideal for field or in-plant treatment of precast concrete or GFRC.

  • Consult coverage rates.


  • Product must be applied within 24 hours of dilution for maximum effectiveness.

  • Will not prevent water penetration through structural cracks, defects or open joints

Prosoco Siloxane WB Technical Data Sheet

Prosoco Siloxane WB Material Safety Data Sheet

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