BITUTHENE® GP

Product Description

BITUTHENE® GP is a combination of a high density polyethylene film and a self-adhesive rubber/bitumen compound. It is supplied in rolls 1 mm thick overall, 1 m wide and 25 m long (25 m²).

Installation

The product is for low-risk applications only and is capable of resisting a hydrostatic head up to 1m. All concrete and masonry surfaces to which the membrane is to be applied must have a smooth finish. Surfaces should be clean, dry free of voids and any sharp protrusions. Masonry surfaces must be rendered to provide an even flush surface, if not rendered then all brick or blockwork must be flush pointed. For higher risk applications, we would recommend the use of BITUTHENE® 4000, BITUTHENE® 8000 or PREPRUFE® 800PA.

Minimum ambient application temperature +5°C. Ensure that all surfaces are clean, dry and free from ice/frost. Surfaces should be smooth, free from voids and protrusions, and any imperfections should be made good using BETEC® NSM mortar.

All surfaces except those below ground bearing slabs should be primed with one coat of Primer B1 applied by brush or roller. BITUTHENE® GP shall be laid by peeling back the protective release paper and applying the adhesive face onto the prepared surface.

BITUTHENE® LM to be applied at necessary internal and external corners, penetrations etc. prior to applying the overall membrane.

BITUTHENE® GP should be brushed onto the surface to ensure good initial bond and exclude air. Adjacent rolls are overlapped 50 mm minimum at side and ends and well rolled with a firm pressure, using a lap roller to ensure complete adhesion and continuity between the layers.

On high walls it may be necessary to batten fix the membrane to prevent slippage.

For application over damp and green concrete, we would recommend to use BITUTHENE® 4000 or BITUTHENE® 8000 system using damp/green concrete tolerant primer.

Repairs, Protection & Drainage

Damaged areas to be repaired with an oversize patch applied to a clean dry surface extending 100 mm beyond damage and firmly rolled. Protect BITUTHENE® membranes immediately after application to avoid damage from other trades, construction materials or backfill, using only Protection 03 boards. If the area around the substructure can be drained to a low level outlet then GCP recommends the HYDRODUCT® range of drainage membranes.

Advantages

• Waterproof - capable of resisting a hydrostatic head when fully supported (up to 1 metre of water)
• Cold applied - safe, no flame, no heating, no torch-on equipment, self-adhesive overlap ensure continuity
• Flexible - accommodates minor settlement and shrinkage movement
• Reduces installation risk - no risk of:
  • Over heating - that damages the membrane and affects performance
  • Under heating – poor membrane adhesion and lap sealing affects water tightness
• Rubber/bitumen - flexibility and resistance to most dilute acids and alkalis
• Lighter roll - for ease of application
• Longer roll - for less storage

Health and Safety

There is no legal requirement for a Safety Data Sheet for BITUTHENE® GP, Protection 03 board, HYDRODUCT® or waterstops. For Primer B1, BITUTHENE® LM and Pak Adhesive™ read the product carton and Safety Data Sheet (SDS) before use. Users must comply with all risk and safety phrases. SDS’s can be obtained from GCP Applied Technologies or from our web site at gcpat.com.

Supply

Equipment by Others: Soft brush, stanley knife; brush or roller for priming. Stiff broom and airline for cleaning surface.

Physical Properties

Declared values according to EN 13967

_{Footnotes:
1. Longitudinal - related to the roll direction
2. Transversal - related to the roll direction
3. MDV: Manufacturer Declared Value
4. MLV: Manufactured Limiting Value
5. NPD: No performance determined}

All declared values shown in this data sheet are based on test results determined under laboratory conditions and with the product sample taken directly from stock in its original packing without any alteration or modification of its component parts.