Millennium Single-Ply Bonding Adhesive EPDM/TPO is a solvent-based contact adhesive that is specifically formulated to adhere to EPDM and TPO roofing membranes. It is designed to provide a strong and reliable bond between the membranes and various substrates, including wood, metal flashings, brick or block masonry, rooftop flashings, insulation, recover, barrier boards, and other acceptable substrates.