Primer is used to clean liner before repairing. It is highly recommended to improve adhesion of repair tape.

Application Instructions:
For use with EPDM Seam and Cover Tapes. Unless the seam has previously been cleaned, this primer should be "scrubbed" into the membrane to remove particles and debris. The application rag should be frequently changed as it becomes soiled. Before and during use (every 15 to 20 minutes) this material should be thoroughly stirred to mix in suspended particles. DO NOT DILUTE THIS PRIMER-IT IS DESIGNED TO BE USED FULL STRENGTH. Apply primer uniformly. Prime an area wider that the actual area to be bonded to ensure full adherence and maximum adhesion. Apply tape when dry.