dBarrier is a subfloor surface liner designed to be installed under sheet vinyl, LVT/LVP, WPC/SPC core, laminate, engineered wood, solid wood, ceramic tile, or carpet tile with any type of backing. The product rolls out onto the subfloor, creating a sound and moisture barrier and providing a “clean-start” liner between the subfloor and finished floor. It levels out any minor irregularities and can be installed on, above, or below grade.. Made from high-density synthetic rubber - Features Guardian antimicrobial - Recommended as “Best Choice” by the Radiant Professionals Alliance - Hypoallergenic and CRI Green Label Plus-certified.