dulas hp

Technical Data Sheet

DULAS HP is a high quality PREMIUM GRADE polymer-rich SBS modified bituminous torch-on membrane with a reinforcement core of spun-bond non-woven polyester mat, used for the most demanding applications of tanking and waterproofing of substructure areas in buildings and civil engineering projects. It is used where a malleable composition is preferred.The DULAS HP range belongs to the Elastoproof group of membranes produced using a special grade of bitumen modified with virgin SBS polymer. The polymer-rich mixture is used to saturate and coat both sides of the polyester mat to the required thickness of the membranes


  • High mechanical properties: good movement accommodation; resistant to tear and puncture.
  • High resistance to hydraulic pressure: provides an impermeable and low absorption layer.
  • Wide temperature tolerance: stable in tropical climates; resistant to thermal ageing and shock.
  • High chemical resistance: withstands effects of salts and other corrosive agents in soil and water.
  • Versatile: available with a range of reinforcements, thickness and surface finishes for use in variety of applications.
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DULAS HP membranes are tested in accordance with UEAtc(European union for technical agreement for construction industry) and can be tested as per ASTM D5147 (Standard Test Method), ASTM D6164 (Standard Specification) and other relevant international standards.


Duproof is an ISO 9001 Quality Assured company, and DULAS HP membranes carry a material warranty against any manufacturing defects.


Nominal weightKg / m23.54.55.5
Dimensions (length x width)[m]10 x 1
CoatingSBS – modified bitumen
Type of carrier180/200/250 g/m2 polyester mat (P)
TopPolymeric foil(F) or Sand(Q) or Slate(S) or(QQ) for both side sand surface
BottomPrinted Polyethylene foil

To order specify finish, reinforcement and thickness e.g. DULAS FHP 200 4mm for foil finish, 200 g/m2 polyester reinforcement and 4 mm thick sheet membrane.


DULAS HP membranes are used where a flexible, high performance waterproofing system is needed, such as

  • Substructure waterproofing of deep foundations subject to high and/or fluctuating water tables.
  • External surfaces of underground water reservoirs, pools and other liquid retaining structures.
  • Floors of plaza decks, multilevel commercial and industrial complexes, buildings, etc.
  • Floors of plaza decks, multilevel commercial and industrial complexes, buildings, etc.
  • Flat and pitched roofs, balconies, terraces, etc.
  • Re-roofing works to the existing structures.


Surfaces onto which the membrane is to be applied must be sound, clean and dry. Dust, loose material and protrusions must be removed and cracks, holes etc made good.
Priming: Apply one coat of DUPRIME solvent based bituminous primer to all surfaces at 5-6 m2/lit and allow to dry. Primed surfaces must be covered within the same day. If left exposed for longer periods, clean and re-prime before applying the membrane.
Membrane Application: Position the rolls carefully with the correct orientation before the torching operation begin. Heat the lower surface of the rolls with a propane gas torch and unroll as the bitumen begins to melt. Maintain minimum 100 mm side laps and 150 mm end laps between rolls, staggering the joints where possible. All seams must be heat sealed from the top to ensure watertight laps.
Protection: For relevant areas like Substructure waterproofing or Tanking etc, once laid, it is recommended to protect the membrane from long-term exposure, construction abuse and backfill, preferably within 24 hours. On vertical areas DUBOARD are recommended; on horizontal surfaces a minimum 25 mm thick sand-cement screed may be used.
DULAS HP membranes are also suitable for partially bonded or loose laid installation. Contact the technical department of your local distributor for advice.


DULAS HP membranes are supplied in rolls of 1m x 10m and shrink wrapped on pallets. Rolls must be kept upright on pallets under shade. DULAS HP pallets should not be stacked over each other.


There are no direct health hazards associated with DULAS HP membranes. Normal precautions for hot and volatile substances should be observed during application. Refer to our MSDS sheets for advice.


Softening point[o C]ASTM D 36120
Penetration, @ 25 oCdmmASTM D 525-35
Heat resistance, 2 hrs. @100 oC——-UEAtcNo flow
Flexibility at low temperature[o C]DIN 52123-15 to -20
Water absorption%ASTM 570<0.4
Type of carrierg/m2Spun-bond Polyester Mat
Tensile strength (L/T)[N / 5 cm]UEAtc750 / 650900 / 7001050/850
Elongation (L/T)[%]UEAtc40/4545/5050/55
Tear resistance (L/T)NUEAtc220/235230/245250/265
Puncture resistance Static Dynamic———UEAtcL4 Static @ 25 Kg
I3 Dynamic @ 9 Joules

In accordance with the standard up to 20% variation is expected

Note: Tolerances on nominal values shown are as per UEAtc directives for polymer modified bitumen membranes. 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 are beyond our control.

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