Exclusive to Home Hardware, this platinum undelay with Thermoboost is for use over concrete or wood substrates above or below grade, and under laminate and engineered wood floors. It is also excellent over radiant heated floors. It diminishes minor sub-floor irregularities, has anti-crush technology for excellent footfall performance and long life, has seal guard for best edge seal, acts as a vapour barrier, and is mould and mildew resistant. Easy to install, it has no V.O.C. emissions and at STC 72 / IIC 73 Delta 21, it has the highest sound rating in the industry. Dimensions are: 2 mm / 3/32" thickness; 100 sq. ft.