Mineral Wool Blanket (1200ºF Mineral Wool Blanket)

THERMFIBER Industrial Blanket Insulation is an economical, flexible, preformed mineral fiber insulation consisting of chemically inert mineral fibers bonded with a high temperature, thermosetting binder. Industrial Blanket Insulation is available in nominal densities from 4 to 10 lb./cu. ft, and suitable for temperatures up to 1200ºF (650ºC).


Linear Shrinkage<2% at 1200ºF (649ºC)
Melting Point ( ºC )1093
Melting Point ( ºF )>2000
Surface Burning CharacteristicsFlame spread 15; Smoke developed 0, per ASTM E-84
Stress CorrosionComplies with ASTM C-795. MIL I 24244B
ComplianceASTM C 553, All Types
Moisture ResistanceAdsorbs less than 1% by weight per ASTM C-553
CombustibilityRated noncombustible per ASTM E 136


THERMAFIBER Industrial Blanket Insulation offers excellent thermal and acoustical performance in both hot and cold applications to conservcell namenergy, maintain process temperatures, provide personnel protection, prevent condensation, and reduce noise emission and transmission.

Industrial Blanket Insulation may be used to insulate plant equipment such as boilers, furnaces, ovens, ducts, precipitators, tanks and other mechanical equipment operating at continuous service temperatures from sub-ambient to 1200ºF.

Specification Compliance

THERMAFIBER Industrial Blanket Insulation products comply to the following standards and specifications: ASTM E 84; rated non combustible as defined by NFPA Standard 220 when tested according to ASTM E 136; ASTM C 177; ASTM C 411; ASTM C 518; ASTM C 553 (Federal Spec. HH-I-558B).

Safety First

Follow good safety and industrial hygiene practices during handling and installing of all products and systems. Take necessary precautions and wear the appropriate personal protectivcell namequipment as needed. Read material safety data sheets and related literature on products before specification and/or installation.


The information presented herein represents typical or average values obtained by ASTM or other standard methods. The values will vary due to normal manufacturing variations. The person using this product must determine its suitability for a particular application.

THERMAFIBER. Inc. shall not be liable for incidental and consequential damages, directly or indirectly sustained, nor for any loss caused by application of these goods not in accordance with current printed instructions or for other than the intended use. Our liability is expressly limited to replacement of defective goods. Any claim shall be deemed waived unless made in writing to us within thirty (30) days from date it was or reasonably should have been discovered.

Features and Benefits

Flexible Insulation for thermal and acoustical performance in commercial and industrial applications.

  • For use in continuous service up to 1200ºF (649ºC).
  • Exceptional thermal performance and resiliency.
  • Dimensionally stable at elevated temperatures with very low linear shrinkage.
  • Excellent fire performance, noncombustible.
  • Will not wick moisture, promote corrosion or conduct electricity.
  • Flexible, lightweight and easy to fabricate.

General Information

THERMFIBER Industrial Blanket Insulation is available in four nominal densities, 4 through 10 lb/cu.ft. that meets or exceeds the requirements of ASTM C 553. Industrial Blanket Insulation products are available in various thicknesses from 1″ to 6″, in 1/2″ increments. Standard width is 24″; standard length is 48″.

Start up Procedure

On initial start-up only, heat rise should not exceed 15ºF per minute to allow binder to dissipate without excessive temperature rise. Thermal conductivity is not affected. When Industrial Blanket Insulation is used in applications exposed to high air velocities, adequate protection must be provided to prevent erosion of insulation. Severe vibration may cause degradation of insulation under some conditions. Contact your representative for recommendations on unusual applications.

Product Variations

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