Curtain Slide Tape allows curtain rings to slide easily across the curtain rod. Spans joint in rod: Prevents rings from getting stuck at the joint in telescoping and extension curtain rods. Material: Curtain Slide tape is made with a durable Teflon-like coating which won't scratch off and will last for years -- even with daily use. Long lasting: Unlike wax, soap and sprays, Curtain Slide Tape is a long-term and maintenance-free solution. Works on: Curtain Slide Tape adheres to wood, metal, wrought iron and plastic with a long-lasting, extra-strong adhesive. Works great on all curtain rod types including fluted and telescoping rods. Transparent: Once applied, Curtain Slide Tape is completely transparent. Installation: The tape should be applied to the entire length of the curtain rod. Easy & Quick to install. Clean the top of the curtain rod, pull off the tape backing and press the tape onto the top of curtain rod.