Adhering Membrane with Water Based Bonding Adhesive

EPDM Water Based Bonding Adhesive is to be used only for bonding the Rubber Flat Roof supplied Membrane and Flashing to underlying roof surfaces, i.e. decking or insulation, walls, penetrations, etc. Water Based Bonding Adhesive is not to be used for field seaming of EPDM Membrane or Flashing. The application of this adhesive should be as follows:

  • Apply adhesive at temperatures of 22°C and above with no chance of freezing in the next 48 hr.
  • Water Based Bonding Adhesive comes in 25ltrs containers.

Application to Non-Porous Surfaces Horizontal Surfaces (isocyanurate insulation) and Vertical Walls

Fold the membrane back so that half of the sheet is exposed. Apply 5-6 mils/0.12 – 0.15mm of adhesive to both surfaces and allow it to turn transparent and dry to a finger touch. The membrane can then be folded over the insulation or up the wall. Broom or squeegee the membrane surface to insure good contact of the membrane to the substrate. Coverage rate is approximately 100-120 sq ft per gallon but may vary depending on the job site conditions. Remove Water Based Bonding Adhesive from seam area with damp cloth.

Application to One Porous Horizontal Surface (wood fibreboard, gypsum board, plywood ,OSB)

Fold the membrane back so that half of the sheet is exposed. Apply 0.25 – 0.30mm of adhesive to the porous substrate only, with a roller. Immediately lay the membrane into the adhesive while wet. If the adhesive has turned transparent, a thin coat of adhesive must be applied to the membrane. Laminating onto one surface while the adhesive is wet will allow for some repositioning of the membrane prior to the adhesive setting. Immediately broom or squeegee the membrane after it is laid into the adhesive to insure good contact. Coverage rate is approximately 36.58mtrs per 3.785ltrs but may vary depending on job conditions. Remove Water Based Bonding Adhesive from seam area with damp cloth.