22 Apr It works far better than other popular types
Spray foam insulation is developed from two types of materials – polyurethane and isocyanate. When combined, both of these materials react to each other and cause their combined substance to expand and harden. The result is a tight seal on all nooks and crannies that would otherwise be left exposed. The resistance value is what sets spray foam apart, providing an air-tight seal which is ranked at R-6 (the highest rank on the market today).