K profile for small gaps. 100% EPDM (Ethylene Propylene Diene Monomer) cellular rubber seals out drafts, dust, and moisture around doors and windows. Remains flexible from -40 F (degree Fahrenheit to 140 F). Easy self-adhesive application, seals 1 door or 2 average size windows. Guaranteed flexible for 10 years. Saves energy and money year-round.