Permanent external sealing band for concrete pipe and structures
MacWrap Chemical Resistant is a permanent external sealing band for reinforced concrete pipe of all sizes and shapes. MacWrap CR is backed by a proprietary coextruded barrier film resistant to hydrocarbons and most known chemical pollutants and is designed to be used in areas where these pollutants are present and concentrated. MacWrap CR is typically specified for gravity flow applications such as stormwater and sanitary sewer which is installed in contaminated soils, especially those contaminated by hydrocarbons. MacWrap CR is designed to prevent inflow/infiltration and exfiltration at the joint. In addition, MacWrap CR is designed to maintain the joint integrity even given less than perfect bedding conditions. MacWrap CR has a proven track record spanning over 35 years and over a million of these couplers are in operation as an assurance against joint failure and/or for joint rehabilitation.
MacWrap CR’s structure includes an adhesive mastic membrane, which is formulated to aggressively bond to the pipe wall which provides a positive and permanent seal around the pipe joint. MacWrap CR is a strong and puncture resistant product due to the embedded high strength polypropylene reinforcing material. A proprietary coextruded multilayer barrier film is laminated to the outside of the coupler. This film has been tested per ASTM F 739 against a battery of chemicals at 95% concentration for permeation resistance with excellent results, including Benzene, Toluene and other hydrocarbon based solvents. In addition, high strength steel compression bands are incorporated within the above structure for tensioning around the full circumference of the pipe, thereby providing added assurance for a positive seal against infiltration.
MacWrap CR is certified to meet the properties of Chemical Resistance. Please contact our engineers for a list of the test results.
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Also ask about MacWrap for Manholes, RCP and Box Culverts.