Bonded Logic Natural Fiber Duct Liner for use in HVAC systems is made from post-consumer recycled denim that is thermally bonded to create a high-performance insulation. Natural Fiber Duct Liner offers superior sound absorption and energy saving thermal performance, while contributing to healthy indoor air quality. The air stream surface of the Natural Fiber Duct Liner is overlaid with a durable and fire-resistant black facing that provides additional strength to the product, minimizing the potential for fiber presence in the airstream.

Natural Fiber Duct Liner contains no fiberglass and does not pose any VOC or off-gassing concerns. The insulation and the facing are treated with a non-toxic solution that actively inhibits the growth of mold, mildew, bacteria and fungi.

Natural Fiber Duct Liner


Natural Fiber Duct Liner is used primarily as an acoustical liner designed for HVAC sheet metal ducts to absorb unwanted noise from multiple sources and reduce heat gain or loss.

Product Features

  • Class-1 Fire Rating
  • Excellent Noise Absorption
  • Low Air Resistance
  • Resists Microbial Growth
  • No Itch or Skin Irritation

Supporting Materials

Standard Available SizesStandard Available Sizes

Standard Available Sizes
Thickness Length Width Density
Inches Millimeters Feet Meters Inches Millimeters
.5 (13) 100 (30.48) 47-59 (1194-1499) 3.0
1 (25) 50 (15.24) 47-59 (1194-1499) 1.5
2 (51) 25 (7.62) 47-59 (1194-1499) 1.5

Acoustical PerformanceAcoustical Performance Sound Absorption was tested in accordance with ASTM C 423 using a type A mounting per ASTM E 795

Product Absorption Coefficients & Octave Band Frequencies (Hz)
Thichness (in) 125 250 500 1000 2000 4000 NRC
1 (25) .07 .33 .72 .99 .93 .96 .75

Thermal PerformanceThermal Performance* Tested in accordance with ASTM C 518

Thermal Performance
Product K-Value C-Value R-Value
Inch (mm)
Btu·in/(h·ft2·°F) W/(m·°C) Btu/(h·ft2·°F) W/(m2·°C) R (m2·°C)/W
½ (13) .26 .037 .52 2.95 2.0 .36
1 (25) .26 .037 .26 1.48 4.0 .72
(38) .26 .037 .17 .97 6.0 1.08
2 (51) .26 .037 .13 .74 8.0 1.44
*Thermal conductance (C) and resistance (R) values are derived from the material thermal conductivity (k) value.

Physical PropertiesPhysical Properties

Physical Properties
Properties Performance Test Method
Operating Limits Temperature Velocity Maximum:250° (121°C)5000 fpm ASTM C 411
ASTM C 1071
Surface Burning Characteristics
(Fire Hazard Classification)
Flame Spread Max: 25
Smoke Developed Max: 50
Class A / Class 1
UL 723
NFPA 255
Corrosion Resistance Pass - Non Corrosive ASTM C 739
Fungi Resistance Pass - No Growth ASTM G 21
Bacteria Resistance Pass - No Growth ASTM G 72

Standard Available SizesProduct Compliances UltraTouch has physical properties that meet the following current requirements, specifications, standards and codes:

Product Compliances
Fire Safety Standards Building Codes
NFPA 90A - Installation of Air Conditioning and Ventilating Systems ICBO - Iternational Conference of Building Codes
NFPA 90B - Installation of Warm Air Heating and Air Conditioning Systems BOCA - Building Officials and Code Administrators
CABO - Council of American Building Officials
SBCCI - Southern Building Code Congress International