Grace Bituthene GP
Size: 1mm x 1m x 25m
Bituthene® GP is a self-adhesive rubber bitumen/HDPE waterproof membrane for low risk applications.
Size: 1mm x 1m x 25m
Weight: 30 kg
Storage: Store upright in dry conditions below +30°C
- 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
- Rubber/bitumen - flexibility and resistance to most dilute acids and alkalis
- Lighter roll - for ease of application
- Longer roll - for less storage
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
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 or Bituthene® 8000.
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.
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.
Please note that Bituthene GP has replaced Bituthene 3000