ROXUL SAFE™ 45 is a semi-rigid stone wool insulation board ideal for firestopping in concealed spaces of multi-unit residential buildings The ROXUL SAFE™ 45 product complies with the 2006 Building code 9.10.16.3 (2). Applications: This product is specifically engineered for use as a firestopping material in concealed spaces of multi-unit residential buildings. Properties: Easily Installed Non-combustible Excellent sound absorbency Does not promote the growth of fungi or mildew Water-repellent Chemically inert; non-corrosive Water-resistant CFC- and HCFC-free product and process Made from natural & recycled materials ROCKWOOL® can contribute to earning LEED® points