Fire-rated cleanroom panels for areas that require strict participate control and where high humidity, chemical vapor, dirt or odor are a problem. Vinyl faced membrane bonded to wet- formed mineral fiber. Easily maintained. Suitable for use in Class 100 (ISO 5) Cleanrooms as defined by Federal Standard 209. Can be cut and requires no special suspension system. 8/cs. 1 cs, minimum. Also available in 2 x 2, quoted on request.