Hardboard Dense, smooth fiberboard with excellent paintability—commonly used in drawer bottoms, backs, and underlayment. Categories Hardboard, HDF, Imported Substrate Hardboard Thickness 1/8" to 1/4" Sizes 4’x8’, 4'x10' Availability Stocked Item Learn More Request Quote Similar Products Radiata Pine Explore MDO Explore Primed Boards Explore