Bostik Dampfix PS Peel N Stick Sheet Membrane System has been appraised for use as a waterproofing membrane for the internal wet areas of buildings within the following scope:

• on floor substrates of concrete, plywood, compressed fibre-cement sheet and fibre-cement sheet tile underlay and on wall substrates of concrete, concrete masonry, wet area fibre-cement sheet lining system and wet area plasterboard lining system; and,
• when protected from physical damage by ceramic or stone tile finishes; and,
• where floors are designed and constructed such that deflections do not exceed 1/360th of the span.

Bostik Dampfix PS Peel N Stick may be used on the following substrates:

• Plywood
• Fibre cement compressed sheet / fibre cement sheet tile underlay
• Concrete and concrete masonry
• Wet area wall linings

See BRANZ Appraisal for full substrate requirements.

• The membrane must be installed by trained installers approved by Bostik New Zealand Ltd.
• Movement and control joints in the substrate must be carried through the membrane and tile finish.
• All materials must be stored inside, up off floors, in dry conditions, out of direct sunlight, below 28°C and above freezing conditions.

Outside the scope of BRANZ Appraisal 1210:

• The use of Bostik Dampfix PS Peel N Stick Sheet Membrane System on concrete slabs where hydrostatic or vapour pressure is present from below is outside the scope of the Appraisal. 
• The ceramic or stone tile finishes are outside the scope of the Appraisal.
• The design and construction of the substrate and movement and control joints is specific to each building and is therefore the responsibility of the building designer and building contractor and is outside the scope of the Appraisal

Bostik Dampfix PS Peel N Stick Sheet Membrane System, if designed, used, installed and maintained in accordance with the statements and conditions of BRANZ Appraisal 1210, will meet the following provisions of the NZBC:

• Clause B2 DURABILITY: Performance B2.3.1 (b) 15 years. Bostik Dampfix PS Peel N Stick Sheet Membrane System meets this requirement. 
• Clause E3 INTERNAL MOISTURE: Performance E3.3.6. Interior wet area floors and walls incorporating Bostik Dampfix PS Peel N Stick Sheet Membrane System will meet this requirement. 
• Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Bostik Dampfix PS Peel N Stick Sheet Membrane System meets this requirement.

See BRANZ Appraisal 1210 for full information.

Dampfix PS Peel N Stick has been used globally since 2018 and in New Zealand since 2022. Since then it has been used on numerous projects across the country.

• Solvent free

No maintenance of the membrane will be required provided significant substrate movement does not occur and the tile finish remains intact. Regular checks must be made of the tiled areas to ensure they are sound and will not allow moisture to penetrate. Any cracks or damage must be repaired immediately by repairing the tiles, grouts and sealants.