Sheet insulation is a flexible, elastomeric thermal insulation, black in color. It is furnished with a smooth skin on one side which forms the outer exposed insulation surface. The expanded closed-cell structure makes it an efficient insulator.
Sheet insulation is certified to consistently provide actual values on these key performance criteria for mechanical system insulation: Thermal conductivity: 0.27; water vapor transmission: 0.10.
As tested by ASTM E 84 Method of Test for Surface Burning Characteristics for Building Materials Sheet Insulation in thicknesses of 1/8", 1/4", 3/8", 1/2" and 3/4" (3, 6, 10, 13, and 19 mm) has a flame-spread rating of 25 or less and a smoke-developed rating of 50 or less. 1" (25 mm) has a flame-spread rating of 25 or less and a smoke-developed rating of 100 or less.
Sheet insulation is used for all applications that cannot be accomplished by pipe insulation. It is particularly adaptable for insulating ductwork, large piping and fittings, tanks, and vessels. Its flexibility allows application to curved and irregular surfaces.
The recommended temperature usage range for sheet insulation is -70°F to +220°F (-57°C to 104°C) according to method of application. With full adhesive coverage attachment, the surface to which it is applied may operate to a limit of 180°F (82°C). When used for pipe insulation with adhesive adhering seams and joints only, sheet insulation can be applied to lines that will operate to a limit of 220°F (104°C).