DryBarrier® is a modular subfloor tile sized 23 1/16" x23 1/16" x 3/8" panels that is sold in 8-packs. DryBarrier® is produced from thermoplastic elastomer and is used on concrete as a subfloor for below grade; slab on grade; and suspended slab construction. The tiles snap together in a stack bond or running bond pattern providing a vapor barrier with a 1/4" air space between the concrete and finished floor.