Auralex Acoustics

Auralex Acoustics

Mineral Fiber Insulation

Product Overview


Mineral Fiber Insulation offers superior acoustic performance with and NRC of 1.00 (2”) and 1.05 (4″). It has a thermal performance with and R-Value of 4.20 (per inch of thickness). Since Auralex Mineral Fiber has a nominal density of 8 pounds per cubic foot (PCF), it is preferred in use of wall, floor and ceiling construction for reducing sound transmission when compared to most standard thermal fiberglass insulation. Mineral Fiber is most effective when used in combination with RC-8 Resilient Channel and SheetBlok Sound Barrier (wall and ceiling isolation) or U-Boat Floor Floaters and SheetBlok Sound Barrier (floor isolation).

Technical Details


2″ – 1.00

4″ – 1.05

Flame Retardancy: Class A (ASTM E-84*)

Qty. Per Box:

  • 2″ – 6 (48 sq. ft.)
  • 4″ – 3 (24 sq. ft.)



*While many Auralex products are fire retardant and/or self extinguishing to varying extents, we cannot guarantee that any product meets the specific building code regulations in your area as regulations widely vary from place to place. Check with you local fire marshal or building inspector for approval prior to purchasing or installing any of our products. Auralex will not be held liable for property damage or injuries caused by misuse of our products.

  • If your installation is a commercial application we recommend that you only consider those products that have a documented fire rating meeting a specific standard. Since local fire codes are not harmonized and are not applied in a uniform manner by local inspectors there is no guarantee of passing inspection.
  • Because of this we recommend checking with your local fire marshal or building inspector regarding which specific test standards will be accepted prior to purchasing our product.
  • We can provide fire test reports for many of our fire rated products performed by certified third party testing facilities.

Contact Auralex Acoustics at 1-800-959-3343 or 

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