It is made of Chemically Cross-Linked Polyethylene Foam; it has good vibration resistance and sound insulation properties. This is a cost-effective impact and airborne barrier for use on timber and concrete floors. Ideal conversion and new build applications as an acoustic layer over a new or existing sub floor? They are also excellent for use under white good such as washing machines and fridges to reduce vibration and airborne nosie.it can also be used under pumps, generators and such like to reduce vibration.