Acoustical Decoupler nine/64" Stops noise transfer through CARPETING, Wooden flooring, laminate flooring, tile flooring and vinyl flooring. Also use on concrete as a humidity barrier and to halt cold transfer for that solution has an R worth of .5. This 9/64" thick cellular strengthened rubber with fiberglass cellulose backing (see https://jamesa962ilm1.magicianwiki.com/user