duseal AP

Technical Data Sheet

DUSEAL AP is an excellent heat and light reflective special self-adhesive waterproofing membrane reinforced with high quality non-woven Polyester mat for excellent tensile and mechanical properties. The top surface of the membrane is covered with superior laminated aluminum foil that is corrosion and alkali resistant and the bottom surface with a siliconized release foil or paper.The elastomeric nature of the synthetically modified coating is designed as a homogeneous mixture of a special bitumen and high quality type SBS elastomer, which ensures high performance product quality.


  • Excellent water vapor barrier.
  • Aluminum faced; prevents solar heat gain; reduces heat ageing. More membrane life.
  • Indirect saving on energy.
  • Cold applied; No bonding agent required.
  • Excellent bonding strength.
  • Superior dimensional stability.
  • Excellent flexibility at low temperatures.
  • High tensile and tear strength.
  • Excellent durability.
  • Easy application.
  • Self adhesive from + 5?C and more

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DUSEAL AP membranes are tested to ASTM, UEAtc and all other relevant international standards.


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


Nominal weightKg/m21.72.02.2
Dimensions            (length x width)m15 x 1
Top Surface———-Alkali proof Aluminum Foil
Reinforcementg/m²100/160 gsm Polyester mat
Bottom Surface———-Siliconized removable paper/foil


  • Efficient water vapor barrier
  • As Waterproofing and light and heat reflective exposed membrane.
  • Applied in ducts, tunnels and vertical structures.
  • Applied directly on thermal insulation boards (Expanded Polystyrene, Extruded Polystyrene, Polyurethane, Glass and Rock wool) to form a waterproofing, vapor barrier and thermal insulation combined system.


The surface to be waterproofed should be dry, smooth, and free from dust, dirt, protrusions and cavities. The surface should be primed thoroughly with Duproof Primer and allow drying. The drying time depends on the porosity of the substrate and the environmental conditions (approx. 0.5 – 3 hrs.)Install DUSEAL AP by removing the release foil / paper and unrolling the membrane along with it. Press the membrane firmly and carefully to the prepared surface in order not to entrap air between the substrate and the membraneThe 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.DUSEAL 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 siliconized foil paper from the bottom side.


DUSEAL AP membranes are supplied in rolls 1m x 15m shrink- wrapped on pallets. Keep rolls upright on pallets under shade.


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 36110
                                                  Flexibility at low temperature                                                  [ºC]                                                   DIN 52123                                                  – 15 to – 20
                                                    Heat resistance @ 90°C / 2 hrs                                                   [ºC]                                                   UEAtc                                                   No flow
Type of carrierg/m²                                                      Non-woven spun bond Polyester
                                                    100                                                      160
                                                    Tensile strength  (L/T)                                                   (N/5 cm)                                                    UEAtc                                                   300/250                                                  500/450
                                                   Tensile Strength (L/T) Carrier                                                     N/mm2                                                 ASTM D 638                                                     20/30                                                    30/40
                                                    Tear Strength (L/T)                                                    N                                                   ASTM D 4073                                                  200/175                                                  200/225
Elongation compound%ASTM D 412>1000

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 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 labor involved are beyond our control.

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