Ultralite MDF Ultralite MDF is light, smooth and ready for paint. Only two-thirds the weight of regular MDF. Ultralite MDF 2013-03-27T16:45:59+00:00 2015-08-26T01:28:42+00:00 fruition Home › Ultralite MDF Specifications Thickness Sheet Size Click link to view more. 12mm 15mm 18mm 25mm 30mm 4' x 8' 4' x 10' Questions? 800.936.7378 Call us or email us by following the link below. Contact Us Now!