Iso-Step® Perimeter Isolation Strip is used with Iso-Step® Floor Underlayment to break the path of vibration transmission between the floor and the wall. The product is extremely flexible, lightweight, easy to install and handle. The material is sold by the roll, 2.5” wide x 50? in length and 6mm thick. The Perimeter Isolation Strip is packaged on a roll for long placement runs and limited cutting.