Product details:

DESCRIPTION & USES For roof/ceiling and interior/exterior wall applications Installed in wood or metal framing cavities or between furring channels. Flexible fiber glass insulation. Can be stapled or friction-fit. Easy to handle and install. Trim and fabricate with a utility knife. Meets thermal specifications. Improves interior noise control. Inorganic. Non-corrosive to steel, aluminum or copper. Dimensionally stable and will not decay or slump in the cavity. R-Value: R22