Aeroflex Sheet and Roll Insulation is a black flexible elastomeric thermal insulation. It is furnished with a smooth skin on one side which forms the outer exposed insulation surface. The expanded closed-cell structure makes it an efficient insulation. It is manufafactured without the use of CFC's, HFC's or HCFC's. All Aeroflex products are made with Microban antimicrobial product protection for added defense against mold on the insulation. It is also effective for reducing HVAC noise. Aeroflex Roll is supplied in 48" wide continuous rolls in nominal wall thicknesses of 1/2", 1", 1-1/2" and 2"