Firwin 1200 Insulation is a mechanically bonded glass fiber insulating blanket that provides reliable, superior performance at temperatures up to 1,200ºF. Manufacturing controls include use of carefully selected long glass textile fibers to ensure uniformity of mechanical bonding without additional binders and a finely engineered needling process that creates uniform insulating efficiency during extended exposure to elevated temperatures.

Firwin 1200 Insulation offers good drapability, conforming to irregular surfaces with ease. It is odorless, does not contribute to metal corrosion, and resists decay, mold, and vermin. It offers excellent sound absorption properties and resistance to vibration without powdering.
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Firwin 1200 Insulation Mat

Firwin 1200 Insulation Mat
Firwin 1200 Insulation Mat

Firwin 1200 Insulation Mat
Firwin 1200 Insulation Mat

Firwin 1200 Insulation Mat
Firwin 1200 Insulation Mat

Firwin 1200 Insulation Mat
Applications N/A Automotive Floor and Front Dash Insulation High Temperature Filtration Industrial and Process Piping Industrial Furnaces and Ovens Marine Muffler Insulation Power Generating Equipment Removable Pads Ship Turbines Thermal and Acoustical Insulation
Standard Width N/A Special widths and roll lengths are available on made to order basis.
Thickness N/A 1/8 in. 3.18mm N/A 1/4 in. 6.35mm N/A 1/2 in. 12.7 mm N/A 1 in. 25.4mm
Density N/A 11.0 lb/ft³ 96 kg/m³
Width N/A 152.4 cm 60 in.
Thermal Conductivity N/A Typical for 11 Lb/ft³ density [Firwin 1200]

Temperature Btu in/hr/sq.ft/ ºF
300ºF 0.40
500ºF 0.50
700ºF 0.65

On initial heat-up past 300º F, there is some out-gassing due to a small residual of organics on the glass fiber surface. Adequate ventilation and exhaust should be provided for any enclosed applications during this period.
Mat Specifications N/A
  • U.L.®, ref. #R11184 - This is the Underwriters Laboratory approval number for Firwin 1200.
  • MIL-I-16411 - This specification establishes requirements for fiberglass insulation felt for thermal insulation of machinery and equipment.
  • MIL-I-24244 - This specification covers asbestos free thermal insulation with special corrosion, chloride, and fluoride requirements.
  • ASTM-C-1086-88 - This is the standard specification for glass fiber felt thermal insulation
Mass N/A 1.0 oz/ft² 305 g/m² N/A 2.0 oz/ft² 610 g/m² N/A 1220 g/m² 4.0 oz/ft² N/A 2440 g/m² 8.0 oz/ft²
Area (per roll) N/A 106.8 m² 1150 ft² N/A 53.4 m² 575 ft² N/A 27.9 m² 300 ft² N/A 18.6 m² 200 ft²
Roll Mass (Net) N/A 32.6 kg 71.9 lb. N/A 32.6 kg 71.9 lb. N/A 34.0 kg 75.0 lb. N/A 100.0 lb. 45.4 kg
Roll Length N/A 300 ft. 91.4 m N/A 150 ft. 45.7 m N/A 22.9 m 75 ft. N/A 15.2 m 50 ft.