Rhino Batts NAF, the formaldehyde free range of glass mineral wool insulation, employs an exciting new binder that is free of formaldehyde, phenol or any other artificial chemicals. Once installed, Rhino Batts NAF acts as a highly effective barrier to heat flow, keeping your building cool during hot weather. It combines cost efficiency with the highest standard of insulation performance when installed in either wood, cement board or steel stud partition and in ceiling system applications.