As you may have expected, open-cell spray foam is similar to closed-cell in nature. It just has a lesser R-value. While most closed-cell spray foams will be above 6.0 per inch, open-cell is much ...

General Plastics Manufacturing, a manufacturer of rigid and flexible polyurethane foams, develops both types of polyurethane foams: open-cell flexible foams and closed-cell high-density foams. The ...