Polybit Bitustick 15 Self Adhesive HDPE Membrane

The application temperature should be between 5°C to 55°C. Application procedures may vary slightly depending upon site conditions. 

The general recommended guidelines for the application of the self adhesive waterproofing system is as follows: 

Surface preparation 
The surface shall be cleaned thoroughly of all contaminants like dust, traces of curing compound, oil and grease. 
All surface imperfections, protrusions, structurally unsound and friable concrete must be removed and repaired with a suitable Polycrete* concrete repair mortar.

 Priming
 Apply Polyprime SB* (Solvent based primer) @ 4-6 m²/L to a clean smooth and dry surface by brush, roller or spray. Allow the primer to dry prior to the application of the membrane. As the viscosity of the primer is low, it easily penetrates into the concrete pores which promotes the adhesion between the membrane and the concrete surface. 
In addition, the primer also acts as a binder for the dust which gets accumulated on the surface even after cleaning. 

Alignment 
Start the installation of all membrane plies from the low point or drains, so that the flow of water is over or parallel to the plies, but never against the laps. 
All overlaps at the membrane seams shall be installed so as to have “up” slope laps over “down” slope laps. Begin membrane application by unrolling the roll of Bitustick membrane and aligning the side laps. 

Application 
Peel off the release film from the self adhesive side and start unrolling the membrane and press it to the surface. Smoothen the membrane from the center to the edges with a wooden press in order to remove any entrapped air. 
Furthermore, an iron roller shall be used for rolling on top of the applied membrane to ensure a proper and strong adhesion of the bitumen compound with the base surface. Side overlaps shall be a minimum of 50mm on the selvedge and end overlaps 100mm. 

Protection 
The membrane shall be protected from damage due to ongoing site activities or from aggregates during backfilling by a tough, weather, warp and rot proof asphaltic protection board (Bituboard / Bitustick R300/ Bitustick R400)*.

 Alternatively, on horizontal areas the membrane can also be protected by laying a cement sand screed (50mm). BITUBOARD can be fixed with a double sided adhesive bitumen tape (Bitutape TS)*.