In 2007 we were contacted by the facility manager for the Hampton Inn Hotel near O'Hare airport. Their aged ballasted EPDM roof was leaking in numerous locations. The fix was to restore the seams on the aged EPDM roof.
First the ballast rock was moved to uncover the seams, then the seams were cleaned to remove years of scale and gunk build up. A primer was applied to the seams to improve the bond between the covertape and existing membrane.
We applied a fabric faced butyl tape and coated all the tape with solvent based elastomeric (SEBS) mastic.