Earthwool® Insulation Board

Unfaced, ASJ+, FSK

Knauf Insulation Earthwool Insulation Board is a versatile product for thermal and acoustical applications such as heating and air conditioning ducts, power and process equipment, boiler and stack installation, and more. It is bonded with ECOSE® Technology and is available plain or with a factory applied foil-scrim-kraft (FSK) facing or allservice jacket (ASJ+), and is the only formaldehyde-free glass mineral wool board product available today.


Performance dashboard

Features & functionality

  • Excellent thermal efficiency results in lower operating costs
  • FSK and ASJ+ vapor-retardant facings provide a neat finished appearance in mechanical rooms
  • Low emitting and formaldehyde-free for indoor air quality considerations
  • Excellent acoustical properties effectively reduce noise

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Environment & materials

Improved by:

  • Utilization of recycled glass
  • Knauf’s original plant-based ECOSE binder technology 

Certification & rating systems:

  • Declare, Red List Free (unfaced) and HPD v2.1 (ASJ+ and FSK)
  • UL GREENGUARD Gold certified
  • UL Validated recycled content
  • UL Validated formaldehyde-free
  • Audited, European Certification Board for Mineral Wool Products exoneration process
  • ASTM C612: Type IA (1.6, 2.25, 3.0, 4.25, 6.0 pcf), Type IB (3.0, 4.25, 6.0 pcf); ASTM C795; ASTM C1136: Type I, II, III, IV, VIII (ASJ+), Type II, IV (FSK)