High polymerzed solvent free primer for torch on membrane


Polyprime T345 is a high performance low viscose and highly penetrative bitumen primer which is specifically designed for use as a primer and sealer coat on concrete surfaces for all torch applied membranes.


  • Greatly improves adhesion between bitumen membrane and concrete surface
  • Low viscosity and highly penetrative
  • Fast drying
  • Cold applied. Does not require heating
  • Binder for dust particles
  • Anti Corrosive
  • Excellent resistance to chlorides and sulphates
  • Solvent free, Environmentally friendly. Low VOC

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

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.


Mix the contents of the pail or drum for a few minutes to remove any sediments. Apply the 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. For highly porous surfaces application of a second coat is recommended.


The coating shall be protected from ongoing site activities and during backfilling from getting damaged by a 150 micron polyethylene sheet.