A Commitment to Unsurpassed Quality

Even with a 150-year tradition of quality products, Johns Manville does not rest on its merits when it comes to continually elevating the quality of its products. Incorporating a Six Sigma methodology, JM evaluates each step of every production process to ensure it is delivering the highest quality to its customers.

New Defiance, Ohio Plant Reflects Quality Standards

With its new plant, JM totally re-evaluated the production of its Micro-Lok® Fiber Glass Pipe Insulation. Using the latest low-tolerance production machinery, JM has incorporated proprietary new glass melting and fiberization processes designed specifically for pipe insulation. New fiber collection and pipe-forming technology will deliver higher levels of uniform density for superior thermal properties. Improved jacketing means better positioning, fewer dimples and a cleaner, whiter look. The result is a consistent, high level of quality that is unsurpassed in the industry.