SG Series Spin-Glas® appliance insulations is an efficient thermal and acoustical blanket made from rotary-process glass fibers bonded with a thermosetting resin.


SG Series Spin-Glas® was developed specifically for freezers, refrigerators, and other low and medium temperature appliances operating up to 350°F (177°C). Also ideal for use in double-wall HVAC equipment.


The range of density and thickness of SG Series Spin-Glas permits the optimization of thermal, acoustical, and space requirements.These resilient fiber glass blankets resist damage and are easily cut with a knife, shear, or steel rule die. The blankets do not contribute to or absorb odors and carry UL Fire Hazard Classification 25/50. The insulation readily conforms to curved and irregular shapes.


HVAC Equipment Liners

Temperature Limit

350°F (177°C)

Available Forms

SG Series Spin-Glas® is available in rolls in a wide range of thicknesses and densities. Densities are adjusted to meet thermal conductivity requirements. In addition this product can be provided specially cut shapes and pieces to particular customer specifications.


  • Refrigerators and Freezers
  • Transportation
  • Water Heater Retrofit Kits
  • Dishwashers
  • HVAC Equipment
  • Other Appliances

View the complete SG Series Data Sheet

View the complete Johns Manville Safety Data Sheet

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