This pipe insulation foam is made with high density closed cell PE foam material and a high quality aluminum foil backing,which has good insulation properties, and is resistant to cold, heat, oil, and moisture. Foam and Foil Pipe Insulation helps stop wasteful heat loss on hot pipes, it also can stop sweaty pipes which can cause mold on cold pipes. It's great for dampening sounds and vibrations throughout the house, strong self-adhesive adhesive can firmly stick to the surface not easy to fall off can provide better sealing.