Product Overview: Neoproof PU W – Water-Based Aliphatic Polyurethane Waterproofing Coating for Exposed Roofs

Neoproof PU W is a water-based aliphatic polyurethane elastomeric waterproofing coating designed for exposed roofs where exceptional mechanical durability and waterproofing properties are crucial. It forms an impermeable film resistant to moisture, UV radiation, and mechanical stress. Available in 13kg and 4kg packaging, it offers high elongation, certified cool roofing properties, and is eco-friendly.

Fields of Application:

Exposed roofs made of concrete, cement tiles, and cementitious screeds.
Walkable roofs requiring high resistance to ponding water.
Metallic surfaces.
Over new or old liquid waterproofing membranes.
Over PU foam insulation for protection.
On top of mineral bitumen membranes.

Properties – Advantages:

High elongation and mechanical strength.
Excellent resistance to ponding water.
Certified cool roofing material (for the white color shade).
Ideal for walkable roofs.
Long-lasting resistance to UV radiation and adverse weather conditions.
Elastic in a broad temperature range (-15°C to +80°C).
No signs of blisters or craters during curing.
Increased hardness and crack-bridging properties.
Applicable under cloudy weather conditions.
Eco-friendly and user-friendly (water-based, one-component).
Long service life.

Certificates – Test Reports:

CE Certification acc. to ΕΝ 1504-2 (Certificate of Conformity Νο. 1922-CPR-0386).
Certified cool roofing material by the University of Athens.
Test report by Geoterra (Νο. 2015-397).
Analysis report by NTUA – School of Chemical Engineering.
LEED v4.1: SS Credit – Heat Island Reduction – Option 1 – High Reflectance Roof, Initial SRI ≥ 82.
Complies with the V.O.C. content requirements acc. to the E.U. Directive 2004/42/CE.

Technical Characteristics:

Density (EN ISO 2811-1): 1.35kg/L (±0.05).
Elongation at Break (ASTM D412): 480% (±20).
Tensile Strength at Max. Load (ASTM D412): 2.28MPa (±0.16).
Tensile Strength at Break (Reinforced with Neotextile®, ASTM D412): >5MPa.
Adhesion Strength (EN 1542): >2.5Ν/mm².
Hardness Shore A (ASTM D2240): 68.
Liquid Water Permeability (EN 1062-3): <0.1kg/m²h 0.5.
Permeability to CO2 – Diffusion-equivalent air-layer thickness Sd (EN 1062-6): >50m.
Water Vapor Permeability – Diffusion-equivalent air-layer thickness Sd (EN ISO 7783): 0.6m (Class I – permeable).
Accelerated UV Ageing: Pass (1000 hours).
Service Temperature: -15°C min. / +80°C max.
Total Reflectance SR% (ASTM E903-12, ASTM G159-98): 84% (white).
Infrared Emittance (ASTM C1371-04a): 0.89 (white).
Solar Reflectance Index SRI (ASTM E1980-01): 106 (white).
Consumption: 1-1.2kg/m² for two layers (cementitious surface).

Curing Details:

Drying Time (+25°C, RH 50%): 2-3 hours (initially).
Dry to Recoat (+25°C, RH 50%): 24 hours.
Full Hardening: ~7 days.

Appropriate Primers on Usual Substrates:

Concrete, Cement Screed: Revinex® (diluted with water 1:4).
Metal (Iron, Steel): Neotex® Metal Primer.
Inox, Galvanized Steel, Aluminium: Neotex® Inox Primer.

Instructions for Use:

Substrate Preparation:

Ensure the surface is stable, clean, dry, and free of dust, oil, grease, and loose materials.
Remove poorly adhering materials and older coatings.
Mechanically or chemically clean the surface to create optimal conditions for adhesion.
Ensure appropriate slopes for water drainage.

Application Conditions:

Substrate Moisture Content: <4%.
Relative Air Humidity (RH): <80%.
Application Temperature (Ambient – Substrate): +10°C min. / +40°C max.

Priming:

Apply the appropriate NEOTEX® primer before applying Neoproof® PU W.
For cementitious substrates, use Revinex® diluted with water, Silatex® Primer, or Vinyfix® Primer.

Application:

After priming, apply Neoproof® PU W in at least two layers by roller, brush, or airless spray.
Dilute the first layer with 5% clean water, and subsequent layers apply undiluted.
Apply each layer in a vertical or different direction than the previous one.

Special Notes:

Do not apply under wet conditions or if rain is expected during application or curing.
Maintain substrate temperature at least 3°C above dew point during application and curing.
Apply sufficiently on vertical surfaces (min. 30cm) to form a uniform waterproofing membrane.
Durability is enhanced by increasing the total dry film thickness through additional layers.
Reinforce with Neotextile® in areas with stagnant water.
Create suitable joints and expansion joints as needed.

Indicative Systems Build-Up: EXPOSED ROOF WATERPROOFING ON CEMENTITIOUS SUBSTRATE

Cementitious substrate
Primer: Revinex® diluted with water (mixing ratio 1:4)
Waterproofing base coat: Neoproof® PU W (diluted 5% with water)
Corner reinforcement: Neotextile® tape
Waterproofing topcoat: Neoproof® PU W (without dilution) Consumption of Neoproof® PU W: 1-1.2kg/m² for two layers.

Maintenance Instructions:

Total hardening occurs approximately 7 days after the final layer.
Prohibit or limit access during this period.
Periodic inspections and cleaning are recommended.
For local repairs, re-apply Neoproof® PU W at the original dry film thickness.

Appearance:

Viscous liquid.

Packing:

Available in 13kg and 4kg plastic pails.

Cleaning of Tools – Stains Removal:

Clean tools with water immediately after application. For hardened stains, use mechanical means.

Volatile Organic Compounds (V.O.C.):

V.O.C. content of the ready-to-use product <40g/l, complying with E.U. Directive 2004/42/CE for this product of category AcWB.

UFI Code:

3C90-E0GP-9003-X994.

Versions:

Neoproof® PU Fiber, fiber-reinforced waterproofing coating.
Neoproof® PU W -40, with resistance to extremely low temperatures down to -40°C.
Neoproof® PU360, for non-exposed surfaces.

Storage Stability:

2 years, stored in its original sealed packing, protected from frost, humidity, and exposure to sunlight.

Neoproof PU W offers a reliable solution for exposed roofs with superior waterproofing and durability. Always adhere to the manufacturer’s instructions for optimal performance.