Insul-Shield – protect non-IC-rated recessed lights or other heat producing fixtures from excessive heat build-up when insulating. 14 in. x 24 ft. roll makes about 6 to 8 shields. Lightweight Aluminum, safe with cellulose, fiberglass and rock wool insulation. Installation is quick and easy. Made of aluminum with .0108 thickness and H24 temperature/hardness (30 gauge).