F-Primer is a black tape primer designed for use with EPDM and TPO rubber roofing installations to enhance the performance and bond of EPDM and TPO seam tape. This black tape primer requires initial stirring at the start of each day and periodically throughout the day. It is a fast drying product but is influenced by both temperature and humidity. Strong initial tack allows for immediate bond of tapes to membranes. This product is not intended for use in OTC states.