1936-1949 Buick Special 40 UltraMat Sound Deadening insulation Deadener Heat Floor Kit , Series 40, 40-B, 40-A1936 1949 Buick Special 40 UltraMat Sound Deadening insulation Deadener Heat Floor Kit The engineering team at Zirgo Sound Labs has specifically designed this kit for your 1936 1949 Buick Special 40 Inner Floor. This kit includes all the correct material needed to reduce echoes, drones and unwanted rattles resulting in a quieter ride. The exclusive advance design of the open closed cell foam wall helps remove unwanted sounds by absorbing background