Warning tapes identify unsafe or restricted areas. Adhesive hazard marking tapes are used to mark harmful or hazardous areas and are commonly made of brightly colored and patterned vinyl coated with a strong adhesive. They bond to a variety of materials including metal and plastic. Hazard warning tapes are conformable and resistant to abrasion, wear, and moisture. Non-adhesive warning tapes are commonly used to cordon off restricted areas and warn diggers of high voltage lines, gas lines, and water and sewer pipes.