Highland's HIGH-RES Heating Fuel Storage Tanks combine the superior strength of steel with the corrosion protection of polyurethane to produce a top-of-the-line residential heating fuel storage tank. HIGH-RES tanks are far superior to asphaltum/primer coated tanks. They set the standards by which all other residential fuel tanks are measured. Highland's HIGH-RES Heating Fuel Storage Tanks are also available in double-wall construction.