Elastomeric Bitumen Coating
Geflow Coating (Elastomeric SBS Modified Bitumen Coating) is an One-component SBS modified bituminous liquid waterproofing membrane, ready to use, highly elastic, to waterproof foundations and floors and for the restoration of bituminous and slated membranes.
It is composed of elastomers, bitumen, resins and additives dissolve in solvent. It is a thixotropic paste easily applicable horizontally and vertically. Once dried it forms an elastic, continuous, waterproofing membrane resistant against thermal changes, UV rays and acid rains.
Geflow Coating adhere perfectly to several supports as bituminous sheaths, concrete, asbestos, plaster, wood, metallic surfaces, etc. It is used for waterproofing of variety of supports such as :
- Eaves
- Underground foundations
- Restoration of old bituminous waterproofing
- Chimneys sealing
- Water proofing of shower stalls before the ceramic tiles laying, corrosion protection, etc.
Its particular composition makes it suitable for applications on humid supports and during winter.
Advantages of using Geflow Coating (Elastomeric SBS Modified Bitumen Coating)
- Can be applied vertically and horizontally
- Outstanding waterproof properties to ensure great protection against corrosion
- Easy to use, single component
- Elastomeric and solvent based
- High elasticity with permanent flexible membrane
- Excellent water resistance after complete hardening
- Excellent adhesion to most building substrates
- Excellent resistance against Chloride and Sulphate ions
- Resistant to underground soil ground water aggressive effect
- Membrane can be easily repaired by spot application
Geflow Coating (Elastomeric SBS Modified Bitumen Coating) – Typical Characterstics
| PROPERTY | STANDARD SPECIFICATION |
| Appearance | Black dense liquid |
| Density at 25°C | 1.1 kg/L |
| Dry residual | 70% |
| Temperature of application | +5°C to +35°C |
| Superficial film formation at +25°C | 1 Hour |
| Extension of break up | > 1000% |
| Complete hardening | 2 days (2 mm thickness) |
| Tensile resistance (ASTM D412) | 0.5 N / mm2> |
| Recovery for 300% elongation (ASTM D412) | 100% |
| Curing time (25°C) | 24 hours |
| Shore A hardness | 30 |
| Vapour permeability | 0.18 gr. m2 / 24 hour |
| Service Temperature | -5°C to +80°C |
| Aging resistance | excellent |
| Water resistance after complete hardening | excellent |
| Crack bridging | up to 2 mm |
*All values are subject to 5 – 10 % tolerance
Coverage / Consumption
Consumption: 1.1 kg/m2> per mm of thickness.
Compiliance Standard
ASTM C 309 – 96
BS 6949:1991
Shelf Life & Storage
Keep in covered area away from direct sunlight and in tightly sealed containers. In these conditions NURPROOF maintains its characteristics for 12 months.
Packing
Geflow Coating is supplied in metallic containers of 20 litre Pails and 200 litre drums.
APPLICATION INSTRUCTIONS & INSTRUCTIONS FOR USE
Surface Preparation
The surface of the concrete shall be sound, clean and uncontaminated.
This preparation shall be such as to leave a sound exposed concrete surface free from dust, loose particles and any deleterious matter. If the concrete surface is defective or has laitance, it must be cut back to a sound base.
Oil, grease, varnishes, rust, dust and mold on metal surfaces shall be removed by wire or stiff brushing and grit blasting then wiped with white spirit prior to priming.
Moss and lichen must be removed physically followed by treatment with fungicidal wash. After treatment, it must be washed down thoroughly with clean water and allow to dry.
Priming
Highly porous concrete or concrete containing micro-silica will require priming with a coat of NURPROOF diluted with 10% of solvent.
The primer shall be applied at a rate of 5-6 m²/L and left to achieve a tack-free condition to dry before applying the top coat. A second coat of primer may be required if the substrate is excessively porous.
Application
Two coats of Geflow shall be applied by brush or squeegee at a rate of 0.87 m2/liter giving a total dry film thickness of 2.0mm thick membrane. For large structural areas, variable mechanical loads, and moving cracks, fiber mesh shall be fixed between the coats.
The two coats must be applied at right angles to one another with a minimum of 6 hour intervals between each application at 25°C. Each coat must be completely dry before the next coat is applied.
A third coat can be applied blinded with clean sand as a protection against foot traffic and/or to provide a good key for top screed.
Do not apply subsequent applications if the membrane is punctured or damaged.
Cleaning
Geflow Coating should be removed from tools, equipment and mixers with clean water prior to the initial set. However, once it has dried, it can only be removed with white spirit.