Minneapolis Minnesota - After using fourteen tubes of polyurethane sealant a mid-1950s suburban Pittsburgh, Pennsylvania, home made significant energy savings in a scientific study, said Bayer MaterialScience.
This was more than a do-it-yourself weekend project, it was part of a polyurethane sealant life cycle assessment to show the benefits of polyurethane sealants, BMS added. It cost around $100 to buy 14 tubes of polyurethane sealant which reduced the airflow through the house by 25%, according to a blower door test, said Bayer. This gives an estimated energy saving of 6.67MWh over 20 years. That is the equivalent to leaving a conventional 60W incandescent light bulb on continuously for 12 years 255 days and 12 hours, said Bayer. The firm added that the $100 investment would be recouped in lower energy costs within four months, according to an estimate.
Jay Johnston, senior scientist, Bayer MaterialScience explained the project in the presentation "Sealants for sustainability: Life cycle assessment of a polyurethane sealant on a residential structure," during the Adhesive and Sealant Council Fall Convention and Expo in Minneapolis.
Bayer said: A life cycle assessment according to ISO 14040/44 is a holistic evaluation of the environmental impacts from all stages of a product's life from raw material acquisition to final disposal. In this case, the product evaluated is a moisture-cure polyurethane sealant applied to a 2,000-square-foot, two-story, brick facade home.
In addition to Dr. Johnston, the study was authored by George Pavlovich, product sustainability and life cycle assessment manager, and; Shen Tian, environmental engineer, all of Bayer.
"With just a small investment in a polyurethane sealant and a little elbow grease, do-it-yourself homeowners can reduce energy usage, in turn lowering energy costs and contributing to the decrease of greenhouse gases," Dr. Johnston said. "This life cycle assessment demonstrates the positive environmental impact when polyurethane sealants are applied in a residential setting."