Spiral wound gasket for heat exchanger is a kind of compound gasket which uses nonmetal material inside （like soft graphite，PTFE，asbestos rubber sheet，ceramic fiber，etc.）and outside uses specially handmade jacketed laminated metal. Antileak GA 01105 are used for heat exchangers where pass bars may be required. The outer portion is of standard spiral wound construction, whereas the rib partition is normally of single or double jacketed style, securely fastened to the I.D. of the spiral wound portion.