Stick-to-concrete single layer loose laid waterproofing membrane system


Bituminous loose laid waterproofing membrane laminated on a tough polypropylene fleece for strong bond with concrete structures


  • Moisture insensitive 
  • Strong & continuous bond with freshly poured concrete 
  • Excellent mechanical strengths 
  • Chemical resistance against chlorides & sulphates in most soil types 
  • Secured overlaps & detailing 
  • Quick application turn-around 
  • Ready for reinforcement assembling immediately after installation 
  • Independent of structural movements

This TDS is applicable for the United Arab Emirates only. Please contact your local Polybit sales office for the available TDS in your region

Step by step

Polyproof Xtreme application temperature shall be between 5°C and 50°C. Application procedures may slightly vary depending on site conditions. The general recommended guidelines for the application of the membrane system, as follows.


The surface to receive the membrane shall be clean, sound, solid and to be free from sharp protrusions and standing water. Clean thorough of all contaminants like dust, traces of curing compound, oil and grease, where necessary for primer or liquid membrane application. All surface imperfections, protrusions, structurally unsound and friable concrete shall be removed and repaired with a suitable Polycrete concrete repair mortar.


The installation of membrane is done in loose laid manner on the blinding concrete in order to keep the system independent of structural movements. Begin installation from closer to project peripheries, with the PP fleece facing upwards. Begin membrane application by unrolling the sheet and aligning the side and end overlaps. In horizontal and vertical joinery area, membranes shall be overlapped with 300 mm. The overlapping joint is recommended to stay on horizontal area, by bringing the vertical membrane down.


The areas of shoring wall shall be of smooth surface, that can be facilitated by concrete / plastering / plywood / suitable approved method for the support of membrane. Align and fix membrane on vertical heights using mechanical fixtures such as securing with wooden reapers. Align and fix subsequent rolls using same method and by securing side overlaps. During vertical extensions of membrane based on stages of structure lifting and after removal of reapers, cut any damaged portion of membrane and allow sufficient overlapping of min. 300 mm and continue with the mechanical fixtures on next level.


Side overlaps, ends overlaps and cut portions joineries shall be with 100mm overlapping, using a double-sided tape Bitutape TS – 100mm wide. One side of the release film is removed and the twin sided tape is adhered to the previous layer of membrane and the second side release film is removed and subsequent membrane layer is carefully placed over it, by ensuring the secured seal with firm press using a steel roller.


Reprofile the pile heads using Polycrete MC as per Method Statements provided. Mark and cut the membrane in such a way to ensure its edges and the reprofiled pile head edges are as close as possible, but not with a gap greater than 5mm. Apply primer Polyprime SB, allow to dry and adhere Bitutape TS around the pile head and place the membrane edges over it. The membrane termination around pile head is now to be securely sealed with CJ Seal elastomeric liquid membrane by creating an angle fillet around the pile and further encapsulated using Polygrout EY 3000 epoxy grout.


All membrane edges are to be fastened using recommended methods such as encapsulation / groove termination / flashing, as deemed appropriate. Note: Please refer to our detailed Method statement of installation and drawings for elaborate coverage.