TECHNOLOGY FOCUS - POLYMERS - Preferred Adhesive: The hot melt adhesive comprises (wt.%): diisocyanate and/or polyisocynate (5-50, preferably 10-45), petroleum liquid (5-80, preferably 5-70), and polyester-polyol, polypropylene glycol, polybutylene glycol, olefinically unsaturated monomers, and/or alkylene diols (5-90, preferably 10-85); acid stabilizer (up to 2), diisocyanate and/or polyisocynate (10-40), petroleum liquid (5-65), catalyst (up to 5), polyester-polyol, polypropylene glycol, polybutylene glycol, olefinically unsaturated monomers, and/or alkylene diols (15-85), and tackifying resin (up to 15); acid stabilizer (up to 1), aromatic diisocyanate and/or aromatic polyisocynate (10-35), petroleum liquid (5-65), catalyst (up to 3), polyester-polyol, polypropylene glycol, polybutylene glycol, olefinically unsaturated monomers, and/or alkylene diols (10-85) and tackifying resin (up to 10); acid stabilizer (up to 1), catalyst (up to 3), propylene glycol (having 500-3000 molecular weight) (15-80), polyester polyol (10-30), diphenylmethane 4,4'-diisocyanate (MDI) (15-30), type I-III asphalt (5-60), and tackifying resin (up to 10); acid stabilizer (up to 8), catalyst (up to 2), propylene glycol (having 800-1200 molecular weight) (20-30), propylene glycol (having 1800-2400 molecular weight) (20-30), polyester polyol (15-25), MDI (10-20), type I-III asphalt (5-35), and tackifying resin (up to 8); acid stabilizer (0.005-0.5), catalyst (0.005-1.5), propylene glycol (having 800-1200 molecular weight) (22-27), propylene glycol (having 1800-2400 molecular weight) (22-27), polyester polyol (20-23), MDI (15-18), type III asphalt (5-21), and tackifying resin (0.1-8); acid stabilizer (0.01-0.4), catalyst (0.005-1), propylene glycol (having 800-1200 molecular weight) (10-25), propylene glycol (having 1800-2400 molecular weight) (10-25), polyester polyol (10-20), acrylic copolymer (10-25), MDI (10-20), type I-III asphalt (5-50), and tackifying resin (0.1-6); or acid stabilizer (0.01-0.2), catalyst (0.005-0.5), propylene glycol (having 800-1200 molecular weight) (15-20), propylene glycol (having 1800-2400 molecular weight) (15-20), polyester polyol (12-27), acrylic copolymer (15-20), MDI (15-18), type III asphalt (5-28), and tackifying resin (0.2-6). Preferred Method: The interply roof membrane secured to the roof membrane at a manufacturing site and rolled into a roll of connected membrane. The interply roof membrane and the roof membrane are conveyed through at least one set of pressing rollers, and/or at least one drum roller, to press the interply roof membrane to the roof membrane prior to the complete curing of the hot melt polyurethane in the hot melt adhesive. The method involves heating the hot melt adhesive to a temperature of greater than 130 degrees F so as to liquefy the hot melt adhesive prior to applying the hot melt adhesive to the roof membrane or the roof deck. Preferred Components: The hot melt polyurethane comprises a) diisocyanate, and/or polyisocynate; and b) polyester-polyol, polypropylene glycol, polybutylene glycol, olefinically unsaturated monomers and/or alkylene diols. The hot melt polyurethane includes an acid stabilizer, a catalyst and/or a tackifying agent. The weight percent of polyester-polyol, polypropylene glycol, polybutylene glycol, olefinically unsaturated monomers, and/or alkylene diols, is greater than a weight percent of diisocyanate and/or polyisocynate. The weight percent of polyester-polyol, polypropylene glycol, polybutylene glycol, olefinically unsaturated monomers and/or alkylene diols is greater than a weight percent of the petroleum liquid. The weight percent of polyester-polyol, polypropylene glycol, polybutylene glycol, olefinically unsaturated monomers and/or alkylene diols is greater than a combined weight percent of petroleum liquid; and diisocyanate and/or polyisocynate. The petroleum liquid has a softening point of at least 130 degrees F and a penetration value of 2-30. EXAMPLE - A hot melt adhesive comprising (wt.%) acid stabilizer (0.01-0.2), catalyst (0.005-0.5), propylene glycol (having 800-1200 molecular weight) (15-20), propylene glycol (having 1800-2400 molecular weight) (15-20), polyester polyol (12-27), acrylic copolymer (15-20), diphenylmethane 4,4'-diisocyanate (15-18), type III asphalt (5-28), and tackifying resin (0.2-6) were prepared.