JM Announces New Corbond® IV Fourth-Generation, Closed-Cell Spray Foam

Johns Manville (JM), a leading global manufacturer of energy-efficient building and industrial insulation products and a Berkshire Hathaway company, announced today the addition of JMCorbond® IV Closed-Cell Spray Polyurethane Foam to its complete line of building insulation products.

JM Corbond IV is a fourth-generation, closed-cell spray foam made with a hydrofluoro-olefin (HFO) blowing agent. It has been engineered to meet stringent new regulations prohibiting the use of materials that have a high Global Warming Potential (GWP). JM released JM Corbond IV to provide a high-quality spray foam product that meets environmental initiatives and changing regulations aimed at decreasing global warming.

“We are excited to release a product that has excellent thermal performance and supports the initiatives of evolving environmental regulations,” said Ashley Denman, JM’s Spray Foam Product Manager. “As an insulation manufacturer, producing materials that support energy efficiency is one of our top priorities. With JM Corbond IV, we can also offer an excellent insulation that has a reduced impact on the environment.”

Yusheng Zhao, Senior Research Chemist at JM, explained that JM Corbond IV is designed to provide similar performance to JM Corbond® III. “JM Corbond IV not only has a lower GWP than JM Corbond III, but also performs competitively in terms of R-value, spray yield and cooling requirements [exothermic properties] when you compare it to the previous generation,” he said. “The main difference between the two products is in the new, HFO blowing agent.”

The new blowing agent in JM Corbond IV has a GWP of less than 2 and an Ozone Depletion Potential (ODP) of 0. It is an excellent choice for high-performing, energy-efficient commercial and residential insulation applications. JM Corbond IV is immediately available to ship anywhere in the United States and will soon be available to ship anywhere in Canada. JM Corbond III will still be available to ship in the U.S. to all states excluding California, New York, New Jersey, Vermont, and Washington. For inquiries, contact JM Tech Connect.

About Johns Manville
Johns Manville, a Berkshire Hathaway company (NYSE: BRK.A, BRK.B), is a leading manufacturer and marketer of premium-quality products for building insulation, mechanical insulation, commercial roofing and roof insulation, as well as fibers and nonwovens for commercial, industrial and residential applications. JM serves markets that include aerospace, automotive and transportation, air handling, appliance, HVAC, pipe and equipment, filtration, waterproofing, building, flooring, interiors and wind energy. In business since 1858, the Denver-based company has annual sales over $3 billion and holds leadership positions in all of the key markets that it serves. Johns Manville employs 8,000 people and operates 46 manufacturing facilities in North America, Europe and China. Additional information can be found at