Waterborne bonding adhesive formulation for sheet membrane incorporating a solid plasticizer

A method of bonding a sheet membrane to an exterior substrate comprising:

• applying an adhesive formulation to at least one of the sheet membrane or the exterior substrate while said adhesive formulation is wet, said adhesive formulation comprising:
• a polyurethane dispersion (PUD);
• (vinyl acetate/ethylene) copolymer (VAE);
• an alkanolamine;
• a tackifying resin;
• an ether;
• and
• water, wherein the formulation has a pH of from 7.0 to 12.5;
• and
• bringing the sheet membrane and the exterior substrate into contact with said adhesive formulation therebetween during construction outdoors, while said adhesive formulation is wet, to bond simultaneously to the sheet membrane and the exterior substrate upon cure of said adhesive formulation, wherein said adhesive formulation builds strength as the water evaporates thereby facilitating adhesion of the sheet membrane to the exterior substrate, the exterior substrate being steel, wood, concrete, a roof board, insulation, or a fiberglass mat roof board.