Black Hole Pad is a thin, black flexible viscoelastic material (filled vinyl copolymer), that is designed specifically to dampen all structural vibration stored from the walls which it is applied. This includes speaker cabinets, car interior panels, and speaker frames. It also is very effective as a gasket material to isolate speaker frames from cabinets. To allow maximum performance, Black Hole Pad has a PSA (pressure sensitive adhesive) backing. Maximum temperature performance is between 50-100 degrees Fahrenheit, and is also flame retardant.