Ultra performance underlayment with moisture barrier; used for laminate and engineered wood floor installations; EVA Construction which protects against severe temperature fluctuation; self stick overlapping tape; anti-cicrobial properties(non allergenic); superior noise reduction in traffic areas; mold and mildew resistant; Fire resistance: UL 94 HFI, F.A.R. 25.83; Acoustic Rating: STC rating: 73 db, IIC rating: 73db.