Self adhesive flexible sealing tape used by many framers. Produces a attractive finish to the back of the frame and is cost effective.
For product longevity, store in a warm, but not hot, dry place. The tape may absorb airborne moisture and could wrinkle if stored in a cold or damp place.
Lion 2430 ECO 15+ (60gsm).
When the temperature drops remember to let self-adhesive tapes, PVA glues, boards and mounting films come up to room temperature before using them. Keep them that way for a few hours after application while the adhesives cure.