Thermoforming HDPE board 1/16 direct factory-HDPE board 4×8 . Oct 06, 2015 · Our high-speed, high-quality equipment is capable of thermoforming rigid materials ranging from .008” to .080” in thickness and foam materials from approximately 1/16” up to ¼”. Part sizes can range from less than one inch up to 36 inches in dimension.