Low Voc cleaner/primer for EPDM and butyl roofing and waterproofing membranes

A method of cleaning and priming surfaces to be bonded, comprising the steps of:

• providing a liquid cleaner/primer composition containing from about 3 to about 8 percent by weight brominated isoprene-isobutylene copolymer, from about 10 to 25 percent by weight thermoplastic resin tackifier, from about 60 to about 80 percent by weight petroleum oil, said petroleum oil having a viscosity of less than about 40 SSU at 100.degree. F., and a curing agent for cross-linking said brominated isoprene-isobutylene copolymer;
• applying a thin film of said cleaner/primer to a first surface to prime said first surface;
• applying an adhesive to said primed first surface;
• and
• adhering a second surface to said first surface at the site of said adhesive;
• wherein, said first surface is a waterproof sheet material and said second surface is a waterproof sheet material.

A method of cleaning and priming surfaces to be bonded, comprising the steps of:

• providing a liquid cleaner/primer composition containing from about 3 to about 8 percent by weight brominated isoprene-isobutylene copolymer, from about 10 to 25 percent by weight thermoplastic resin tackifier, from about 60 to about 80 percent by weight petroleum oil, said petroleum oil having a viscosity of less than about 40 SSU at 100.degree. F., and a curing agent for cross-linking said brominated isoprene-isobutylene copolymer;
• applying a thin film of said cleaner/primer to a first surface to prime said first surface;
• applying an adhesive to said primed first surface;
• and
• adhering a second surface to said first surface at the site of said adhesive;
• wherein, said first surface is a metal material and said second surface is a rubber material.