Cali Complete All-in-One Underlayment is designed for moisture and vapor protection for all subfloors and floor types. The do-it-all, non-toxic sheet also achieves better overall noise reduction. Cali Complete thermal insulation makes floors warmer and more comfortable. Interlocking edges and a fan-fold design mean simple installations for homeowners and pros alike. And as an added plus for the planet, Cali Complete is 100% recyclable. Pair with Metallized Seaming Tape to ensure a full moisture barrier, even over concrete.