Enviro Hydrostatic 1

Flexible Cementitious Waterproofing Membrane


Based on advanced cross-linking polymer technology, Enviro Hydrostatic 1 a single component flexible polymer modified cementitious membrane. The addition of water to the Hydrostatic 1 powder forms a high-quality, liquid membrane system. Hydrostatic 1 should be applied over concrete, masonry and natural stone substrates. The cured film provides a watertight membrane that is permeable to vapour diffusion and offers excellent freeze-thaw durability, as well as outstanding adhesion properties.

Typical Uses

Enviro Hydrostatic 1 is suitable for commercial, industrial and residential applications in the following areas:

  • Basement Walls
  • Cellar Walls
  • Fish Ponds
  • Swimming Pools
  • Lift Pits
  • Potable Water Containment

Suitable Substrates

Enviro Hydrostatic 1 is suitable for use over the following substrates:

  • New Concrete
  • Fibre Cement Non-Coated Walls—(min. 6mm)
  • Renders—(Cured for min. 7 days)
  • Compressed Fibre Cement—(15mm)
  • Natural Stone including Sandstone


  • Flexible
  • Low VOC content
  • Bonds to damp surfaces (no primer required)
  • Single part (just add potable water)
  • Compatible with Enviro GTA and Enviro GTX tile adhesives
  • Suitable for immersion and underground applications
  • Positive pressure to 60m head
  • Negative pressure to 15m head
  • Resistant to salts and carbonation
  • Water-based
  • Excellent vertical hold-up
  • Crack bridging up to 1mm


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Suitable Primers

No priming is required for Hydrostatic 1. Surfaces must be pre-wet using a light water mist but should be free of surface water. This assists with the workability of the products and reduces rapid drying of product particularly over porous surfaces.