Johns Manville. Formaldehyde-free MR faced fiberglass batts use a water-based acrylic binder that meets California’s Section 01350 standards. The facing serves as an integral vapor retarder, chemically protected against potential fungi growth. Available in pre-cut batts, including Easyfit designed for standard wall cavities, MR faced batts are available with insulative properties up to R-38. 800.654.3103. www.specjm.com.