Si-COAT® 400WP™ Waterproofing Silicone Wall Coating

A silicone elastomeric waterproofing with excellent protection, flexibility, durability, and a long service life.

Si-COAT 400WP is an architectural coating for use in above grade aplications. It can be used over masonry such as concrete, concrete block, brick, stone, EIFS, stucco, wood, and previously coated surfaces. As a result of its specific chemistry, Si-COAT 400WP forms chemical bonds with the host surface to enhance adhesion properties without the need for priming and extensive site preparation. 

The single component, room temperature vulcanizing (RTC) moisture cure polysiloxane technology provides superior performance and durability by allowing internal moisture vapor to diffuse out, and exterior water to be repelled. This unique ability protects surfaces from dampness, weather damage, wind-driven rain, and allows drying from within the substrate. Also, due to the hydrophobicity of the coating, the surface can easily be cleaned using water under low pressure.

  • Elastomeric: thin film membrane (20 mil min) bridges cracks and accommodates movement due to freeze-thaw cycles up to 1/8 inch.
  • Breathable: allows moisture vapor to diffuse through a liquid water barrier membrane.
  • UV performance: all colours are formulated with Ir reflectant or inorganic pigments and are tested to withstand 5000 hours of accelerated weathering testing (QUV) without chalking or fading.