AmericanElm Pack of 6 In Available Mutiple Sizes & Thickness. WaterProof MDF boards that called as HDF generally come in Green Colours woods.AmericanElm Pack of 6. WaterProof MDF boards that called as HDF generally come in Green Colours woods. HDF(high density fiberboard) or MDF(medium density fiberboard) are composite boards that are used in woodworking to make cabinetry, wall panels, shelving, and furniture. They can be pasted with veneers or laminates on one or both sides or can be finished with paint. PRODUCT SPECIFICATIONS: BRAND: American Elm PRODUCT: AmericanElm Pack of 6.