Polyfab BB

Polyfab BB

Polyfab BB is a 100mm wide self-adhesive non-woven polyester fabric. It incorporates a self-adhesive portion (central 1/3 of tape) that acts as a bond-breaker over joints, cracks or other areas of movement. When used in conjunction with approved liquid applied waterproofing membranes the combined system will meet the requirements of AS 3740:2005 “Waterproofing of Wet Areas Within Residential Buildings”.

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  • Features & Benefits
  • Areas of Use

Features & Benefits

  • Breaks bond of membrane system to allow movement at joints 
  • Does not crease during installation 
  • Bridges gaps 
  • Strengthens membranes by increasing tensile strength and puncture resistance 
  • Easy to wet out 
  • Outstanding conformability 
  • High grab tensile strength 
  • UV stable 
  • Rot proof when buried 
  • Flexible

Areas of Use

  • Movement joints 
  • Gutters 
  • Roof Areas 
  • Flashings
  •  Cracks in substrates
  • Flashings 
  • Cracks in substrates


Consistent with the 50 year history of Crommelin, our management team is committed to providing all customers with sound technical advice, innovative products and acceptance of responsibilities associated with our specifications and systems. Warranties of up to 15 years are issued following Quality Assurance procedures. They consist of tailored specifications, maintenance schedules and on site support. Please contact Crommelin for further information.

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