Polyethylene Encasement (Polywrap) has long been studied and proven to be the most effective and economical way to provide exterior corrosion protection to ductile iron pipe, valves, and fittings. Corrosion protection methods have evolved over the years and recently Enhanced Polyethylene Encasements have been introduced to further combat corrosion concerns involving micro-organisms. Enhanced polyethylene gives you the same great protection now with added “enhanced” features such as: -Multi-layer co extruded LLDPE -Anti-microbial biocide -Volatile Corrosion Inhibitor (VCI) -Greater Protection Over Standard Wraps-Meets ANSI/AWWA C105/A21.5