Technical Data Sheet

DUCOAT 65 is thick emulsified bitumen protective coating manufactured from high quality bitumen for superior performance. The special high quality product gives excellent adhesion to concrete and metal surfaces and forms a robust protective coating upon drying.


  • Excellent liquid applied protective coating.
  • Forms a tough and resilient film upon drying.
  • Resistant to dilute chemicals.
  • Excellent adhesion to substrate.
  • Easy application on vertical surfaces.
  • Solvent free, no-fire hazard.
  • Water based no health hazard.
  • Non-flammable, non-explosive.
  • Excellent adhesion on damp and dry surfaces.

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DUCOAT 65 is tested as per ASTM D 2939 and other relevant International Standards.


Duproof is ISO 9001 Quality Assured Company and DUCOAT 65 carries a material warranty against any manufacturing defects.


  • Damp proofing and protective coating for most building construction materials such as concrete, asphalt, cement and modified bitumen sheet membranes.
  • Protective layer for concrete foundations, vertical walls and columns as well as to prevent corrosion on pipes and other various types of surfaces.


Substrate Preparation

  1. All substrate must be clean, free from dirt, dust, soil, grease, oil and other loose particles. Substrates that are very dry should be applied with a penetrative coating of DUPRIME E.  If the concrete is very dry dampen first with water.
  2. Stir the emulsion thoroughly if stored for a long time.

Application System on Porous substrate (Concrete Structure)

  1. Prime the surface with water based primer DUPRIME E and allow the primer to dry completely (6-8 hours).
  2. Apply a minimum 2 coat by brush or spray equipment.
  3. The second coat is applied when the first coat has completely dried.
  4. Apply each coat at a right angle to the previous coat to achieve good coverage and uniformity.
  5. A third coat is required for very porous substrate.
  6. Drying time is 1-4 hours under normal conditions. Under damp and cold conditions it is recommended to allow 6 hours between successive coats.

Emulsified Bitumen is recommended to be applied at temperatures above 5°C.


DUCOAT 65 is available in 20 liter pails and 200 liter drums, palletized and strapped. Store at temperature between 5°C and 50°C in a tightly sealed container. Shelf life is minimum of 1 year in a good storage protected from direct sunlight and frost.


There is no health hazards associated with DUCOAT 65, wash with copious amount of water if spilled on the skin.


Solid Contents%60 ± 5ASTM D 2939
DensityKg/L0.95 – 1.00
AppearanceDark brown liquid forms into black, coating upon drying
Heat ResistanceCured film is non-flowing and non-sagging under service conditionsASTM D 2939
Service temperature°C0 °C to +80 °C
Chemical and water resistanceResistant to water, salt, dilute acids and alkalisASTM D 2939
CoverageKg/m20.3 to 0.5 Kg/m2/Coat-Depending on the substrate
Drying timehrs1.0 – 4.0
Firm Sethrs24
pH10 – 12


The brush and spray equipment is cleaned using soap and water immediately after use. Place tools in water during breaks to prevent caking up of the bristles.

Note: These data are correct at the time of printing but may be changed without any prior notice subject to client’s requirements availability of raw materials or other conditions. This data sheet supersedes all previous publications pertaining to this product. All reasonable care has been taken in preparing this document, which to the beat of our knowledge is accurate and true. Recommendations and suggestions are made in good faith and should only be considered for general guidance. No liability is assumed or taken by us in relation to the application, as usage conditions and any labour involved is beyond our control.

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