HOW IS EPDM MEMBRANE SPLICED TOGETHER?
Two methods of splicing are currently available using either liquid adhesive or splice tape.
When using liquid adhesive, adjoining sheets are cleaned with the manufacturer’s recommended splice cleaner prior to applying the splicing adhesive. A sealant is used along the edge of the splice and is applied after allowing solvent in the adhesive to flash off (minimum 2 hours). Some manufactures have also used an additional sealant within the overlapping area that is applied immediately before putting the splice together. The sealant is intended as a secondary protection to guard against moist penetration in the event of workmanship error at intersections with factory seams.
The second method of splicing was developed to speed up the seaming processing while maintaining consistent application across the entire seam. This process introduced the use of an adhesive tape in conjunction with a splice primer. The adjoining membranes are primed then the tape is applied once the primer has dried. No additional sealant is used along the edge of the splice. This method has become more favorable due to application consistency.