RPR Products Insul-Mate™ Galvanized Steel Roll Jacketing is manufactured from continuous hot-dipped G90 zinc coated steel, per ASTM A-653, and, compared with aluminum, galvanized steel has superior physical properties. It is stronger, providing more abuse resistance. Possessing a higher melting temperature, it provides greater fire protection. Having excellent corrosion resistance, it can be used where environmental conditions permit the long term use of galvanized steel. The coated steel meets ASTM A-653 .