duseal ps 250

Technical Data Sheet

DUSEAL PS 250 is a special SBS- modified self-adhesive protection membrane incorporating a surface reinforcement of tough, heavy-duty spun bond non–woven polyester mat. DUSEAL PS 250 is specially designed for use as protection sheet over other membrane in a wide variety of applications. The bottom surface is covered with siliconized release paper or foil. The DUSEAL range belongs to the Elastoseal group of membranes produced using a special grade of bitumen modified with virgin SBS polymer. The polymer-rich mixture is used to saturate and to coat both sides of glass fiber mat to the required thickness of the membrane.


  • Ease of application over existing membranes
  • Excellent bond to self adhesive and torch on membranes with foil finish
  • High tear strength and puncture resistance.
  • Conforms to difficult contours and shapes
  • High dimensional stability
  • Resistant to UV and to chemicals found in soil and ground water.
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DUSEAL PS 250 membranes are tested to ASTM, UEAtc and other relevant international standards.


Duproof is an ISO 9001 Quality Assured Company and all DUSEAL PS 250 membranes carry a material warranty against any manufacturing defects.


Thickness [mm] 1.5 1.8 2.0 2.5
Dimensions        (length x width) [m] 15 x 1
Coating   SBS-modified self adhesive compound
Top Surface   Special Polyester mat
Bottom   Siliconized removable foil/paper

To order specify thickness, e.g. DUSEAL PS 250 1.5 mm for 1.5 mm thickness


DUSEAL PS 250 is designed for use as a protection sheet over waterproofing membranes (e.g. DUSEAL FP ) where traditional protection boards prove difficult to install, such as

  • Foundations
  • Manholes, pipes and the like
  • Tunnels, trenches and ducts
  • Any structure where shape conformity is important.


The substrate to be waterproofed / protected should be dry, smooth, and free from dust, dirt, oil, protrusions and cavities. The concrete or metal surface should be primed thoroughly with DUPRIME -Duproof Primer and allow to dry. The drying time depends on the porosity of the substrate and the environmental conditions (approx. 0.5 – 3 hrs.)Install DUSEAL PS 250 by removing the release foil and unrolling the membrane along with it. The membrane especially at the overlaps should be firmly pressed down from the center to the sides, to ensure a good seal and to remove entrapped air. Allow end lap of 150 mm and side laps of 100 mm or as per code of practice and ensure complete sealing.DUSEAL PS 250 in general can be adhered to various types of substrate (concrete, concrete blocks, bricks, foam concrete, fiber cement board, wood boards and metal substrates) by removing the silicon-based foil from the bottom side. When applied over DUSEAL CXL or DUSEAL FP or DUWRAP tapes ensure the adhering surface is free of dust, grease, oily nature or water to achieve good bonding.

Contact the technical department of your local distributor for advice.


DUSEAL PS 250 membranes are supplied in rolls 1 m x 15 m; shrink wrapped on pallets. Keep rolls upright on pallets under shade. DUSEAL PS 250 pallets should not be stacked one over the other.


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


Softening point [ºC] ASTM D 36 110
                                                   Flexibility at low temperature                                                    [ºC]                                                    DIN 52123                                                    – 15 to -20
                                                  Heat resistance @ 90°C / 2 hrs                                                    [ºC]                                                    UEAtc                                                    No flow
                                                   Compound Elongation                                                   (%)                                                    ASTM D 412                                                    > 1500
UV resistance   ASTM G 53 Excellent
Chemical resistance   ASTM D 543 Excellent
                                                   MECHANICAL PROPERTIES
Tear resistance  (L / T) N ASTM D 4073 300/300
Puncture resistance N ASTM E 154 >1000

Note: These data are correct at the time of printing but may be changed without any prior notice subject to clients 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 best 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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