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HYPERDESMO-PB-2K Two-component liquid membrane for waterproofing & protection. - rbbco

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HYPERDESMO-PB-2K Two-component liquid membrane for waterproofing & protection.


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CHARACTERISTICS:

HYPERDESMO-PB-2K is a fast-curing, two-component, bitumen-extended polyurethane fluid. It produces a highly elastic membrane with strong adhesion to many types of surfaces and excellent mechanical and chemical resistance properties. It is based on a pure elastomeric hydrophobic polyurethane resin extended with chemically polymerized virgin bitumen. Apply with brush, roller, spatula or airless spraying. Minimum consumption: 1.0-1.5 lit/m2.


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COMPLIANCE - CERTIFICATION

  • CE: ETA-10/0095
  • ASTM C836-95
  • Root resistance
  • Compliance / performance

Waterproofing and protection of:

  • Gypsum and cement boards
  • polyurethane insulation foams
  • asphalt membranes
  • EPDM membranes
  • bathrooms (under tiles)
  • verandas and balconies (under tiles)
  • flower pots and roof-top gardens
  • light roofing made of metal or fibrous cement
  • non-potable water tanks
  • basements
  • foundations
  • bridge platforms
  • cut-and-cover tunnels
  • Irrigation channels

LIMITATIONS: Not recommended for unsound substrates.

FEATURES & BENEFITS

  • Components easily mixed, 1:1 by volume
  • Fast curing
  • Thick, bubble-free, membrane possible
  • Being a two-component product means that the quantities not mixed can be stored for later use
  • Its low modulus gives it excellent substrate crack-bridging properties
  • Excellent adhesion on almost any surface, with or without the use of special primers
  • No thinning is required but SOLVENT-01 may be used
  • Excellent thermal resistance, the product never turns soft. Max service temperature 80 oC, max shock temperature 200 oC
  • Resistance in the cold: The film remains elastic even down to -40 oC
  • Excellent mechanical properties, high elongation, tensile and tear strength, high abrasion resistance
  • Good chemical resistance
  • Good water vapor barrier properties
  • Can also be used as a joint sealant

APPLICATION PREREQUISITES

Can be successfully applied on:

Concrete, fibrous cement, mosaic, cement roof tiles, old (but well adhered) acrylic and asphalt coats, wood, corroded metal, and galvanized steel. For information about other substrates, please contact our tech department.

Concrete substrate conditions (standard):

  • Hardness: R28 = 15Mpa
  • Humidity: W < 10%
  • Temperature: 5-35 oC
  • Relative humidity: < 85%

Primer selection for special conditions and substrates: Please refer to the Primer Selection Table.

APPLICATION PROCEDURE

Clean the surface using a high pressure washer, if possible. Remove oil, grease and wax contaminants. Cement laitance, loose particles, mould release agents, cured membranes, etc. must be removed.

Priming:

Choose primer from the Primer Selection Table and follow the application instructions given on its prospectus.

Mixing:

Mix equal volumes of the two components manually or with a low speed (300 rpm) mixer. Apply mixed quantities immediately. Pot life (of mix): 30-45 minutes at 20 oC. For application by airless spraying, the mix may have to be thinned with a small quantity of SOLVENT-01, especially for low-power applicators.

Crack bridging:

Apply HYPERDESMO-PB-2K (or HYPERDESMO-PB-1K) locally over any cracks larger than 1 mm before the main coat.

Application:

Apply the material with brush, roller or spatula.

CONSUMPTION

Minimum consumption: 1.0-1.5 lt/m2.

CLEANING

Clean tools and equipment first with paper towels and then using SOLVENT-01. Rollers will not be re-usable.

PACKAGING

2×5 lit, 2×20 lit and 2×200 lit.

SHELF LIFE

Can be kept for 12 months minimum in the original unopened pails in dry places and at temperatures of 5-25 oC. Cap tins air tightly in order to store unused quantities.

PRECAUTIONS

Contains a small quantity of volatile flammable solvents. Apply in well-ventilated, no smoking areas, away from naked flames. In closed spaces use ventilators and carbon active masks. Keep in mind that solvents are heavier than air so they creep on the floor. The MSDS (Material Safety Data Sheet) is available on request

TECHNICAL SPECIFICATIONS

In liquid form (before application): ~90% dry matter in Xylene.

PROPERTY UNITS METHOD SPECIFICATION
Viscosity (Brookfield) Comp. A: Resin

Comp. B:  Asphaltic mix

cP ASTM D2196-86, @ 25 oC  

1300

4300

Viscosity (Brookfield) of the mixture cP ASTM D2196-86, @ 25 oC 3000
Specific weight of the mixture gr/cm3 ASTM D1475 / DIN 53217 / ISO 2811,

@ 20 oC

0.97
Flash point oC ASTM D93, closed cup > 40
Tack-free time, @ 77 oF (25

oC) & 55% RH

hours 1-2
Recoat time hours 6-24

The cured membrane:

PROPERTY UNITS METHOD SPECIFICATION
Service temperature oC -40 to 80
Max. temperature short time (shock) oC 150
Hardness Shore A ASTM D2240 / DIN 53505 / ISO R868 35
Tensile strength at break @ 23 oC Kg/cm2 (N/mm2) ASTM D412 / EN-ISO-527-3 > 20

> (2)

Percent elongation @ 23 oC % ASTM D412 / EN-ISO-527-3 > 1000
Tensile set (after 300% elongation) % ASTM D412 < 1%
Thermal resistance (200 days @ 80 oC) EOTA TR011 passed
QUV Accelerated Weathering Test (4hr UV, @ 60 oC (UVB- Lamps) & 4hr COND @ 50

oC)

 

 

 

 

ASTM G53

 

passed (1000 hours)

Chemical resistance (Sodium Hypochlorite NaOCI 5% 10 days)  

 

 

unaffected

Hydrolysis resistance (Potassium Hydroxide 8% 10 days @ 50 °C)  

 

 

unaffected

H2O absorption (10 days) < 0.9%

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