Self-adhesive rubber bitumen/HDPE waterproof membrane for low risk applications

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).


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.


  • 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


BITUTHENE® GP 1 m x 25 m roll (25 sq m)
Weight 30 kg
Storage Store upright in dry conditions below +30°C
Primer B1 5 & 25 litre drums
Coverage 7-10 sq m per litre application, (depending on surface porosity and ambient temperature)
Ancillary Products  
BITUTHENE® LM 5.7 litre packs
Protection 03 board 3 mm x 0.9 m x 2.03 m (± 6%)

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

Physical Properties

Property Typical Value Test Method
Tear Resistance Long 91.6 N
Trans 89.6 N
MOAT 27:5.4.1
Peel Strength 105.4 N MOAT 27:5.1.3
Tensile Strength
of joints
130.6 N MOAT 27:5.2.2
Moisture Vapour Permeability 0.39 g/m2/24 hours BS 3177: 1959 (75% RH/25°C)
Resistance to hydrostatic head < 1m of water ASTM D5385

Declared values according to EN 13967

Property Declared Value Test Method Property Declared Value Test Method
Visible defects - MDV None EN 1850-2 Straightness - MDV Pass EN 1848-2
Length (m) - MDV 25.15 ± 0.15 EN 1848-2 Thickness (mm) - MDV 1.12 ± 0.08 EN 1849-2
Width Carrier Sheet (m) - MDV 0.987 ±0.007 EN 1848-2 Mass per unit area (g/m²) - MDV 1050 ± 90 EN 1849-2
Width Overall (roll) (m) - MDV 1.000 ± 0.010 EN 1848-2 Durability of water tightness against ageing/degradation (at 60 kPa) Pass EN 1296
EN 1928 Method B
Water tightness to liquid water (at 60 kPa) Pass EN 1928 Durability of water tightness against chemicals (at 60 kPa) Pass EN 1847
EN 1928 Method B
Resistance to impact (Al-board (mm) - MLV) ≥100 EN 12691 Compatibility with bitumen Pass EN 1548
EN 1928
      Resistance to static loading ≥ 10 - Pass EN 12730
Resistance to tearing (Nail Shank)- (N) - MLV Long¹ ≥100
Trans² >110
EN 12310-1 Tensile properties - unreinforced sheets (N/50mm) - MLV Long¹ ≥ 200
Trans² ≥ 250
EN 12311-2 Method A
Joint strength (N/50mm) - MLV ≥ 130 EN 12317-2 Tensile properties - unreinforced sheets (Elongation %) - MLV Long¹ ≥ 270
Trans² ≥ 220
EN 12311-2 Method A
Water vapour transmission (μ= sD/d) - MDV 120,000 ± 30% EN 1931 Method B Reaction to fire (Class; test conditions) E EN 13501-1
Resistance to deformation under load NPD5 As relevant  Dangerous Substances  NPD5 As relevant

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. | United Kingdom customer service: +44 (0) 1480 478421

We hope the information here will be helpful. It is based on data and knowledge considered to be true and accurate, and is offered for consideration, investigation and verification by the user, but we do not warrant the results to be obtained. Please read all statements, recommendations, and suggestions in conjunction with our conditions of sale, which apply to all goods supplied by us. No statement, recommendation, or suggestion is intended for any use that would infringe any patent, copyright, or other third party right.

BITUTHENE, BETEC, PREPRUFE, and HYDRODUCT are trademarks, which may be registered in the United States and/or other countries, of GCP Applied Technologies Inc. This trademark list has been compiled using available published information as of the publication date and may not accurately reflect current trademark ownership or status.

© Copyright 2021 GCP Applied Technologies Inc. All rights reserved.

This document is only current as of the last updated date stated below and is valid only for use in the United Kingdom. It is important that you always refer to the currently available information at the URL below to provide the most current product information at the time of use. Additional literature such as Contractor Manuals, Technical Bulletins, Detail Drawings and detailing recommendations and other relevant documents are also available on Information found on other websites must not be relied upon, as they may not be up-to-date or applicable to the conditions in your location and we do not accept any responsibility for their content. If there are any conflicts or if you need more information, please contact GCP Customer Service.

Last Updated: 2022-11-24