Model KNM-100AL

Description and Application

A new fire-resistant noise barrier material for wrapping ducts, valves and pipelines is now available.

Designed for indoor or outdoor use, Kinetics Model KNM-100AL noise barrier material reduces risks due to burning, and retards smoke development and flame spread. The material is designed to reduce sound transmission from HVAC duct, fluid or gas pulsations in pipelines for chemical, petrochemical, and waste water treatment plants and gas utility pressure-reducing stations.

The material is constructed of mass-loaded, limp vinyl with a layer of reinforced aluminum foil facing on one side. The vinyl provides mass and flexibility, while the aluminum adds increased mechanical strength, weatherability, attractive appearance, and improved fire retardancy.

The non-lead composition of the material allows for safe handling and easy installation. When applied over an insulation material such as fiberglass, foam, ceramic fiber or mineral wool, Kinetics fire-resistant barrier material is simply cut to length, wrapped around the pipe or duct, and fastened with adhesive, tape, mechanical fasteners, or bands.

Technical Data

Sound Transmission Loss (TL)

1.0 psf mass loaded vinyl tested as free hanging barrier

Frequency, Hz63125250500100020004000
1# TL,dB - 13 17 21 28 33 40

Insertion Loss (IL)

2.0 psf Model KNM-100AL tested as wrapping over 2" thick, 5 pcf fiberglass around steel retangular duct.

Frequency, Hz63125250500100020004000
2# IL 5 9 18 28 34 37 37

Service Temperature: -40°F to 220°F (-40°C to 104°C)

Thermal Conductivity: K = 0.29

(0.36 cal-cm)

Flammability Per Fed. Test Std. No. 191-5903:

  • Flame Out: 0 Sec.
  • Afterglow: 0 Sec.
  • Char Length: 0.2 inch (5 mm)

Corrosion Resistance: Excellent for most oils, grease, acids, and mild alkalis.

Material Thickness: 0.10" (3 mm)

Material Roll Size:

  • KNM-100AL - 54" x 60' (1.4 m x 18 m)

Fire Testing Data

Surface Burning Characteristics per ASTM E84 - KNM-100AL:

  • Flame Spread Index - 10
  • Smoke Developed Index - 40


The barrier shall be constructed of a 0.10" or 0.20" (3 or 6 mm) thick, mass-loaded, limp vinyl sheet bonded to a thin layer of reinforced aluminum foil on one side. The barrier shall have a nominal density of 1.0 or 2.0 psf (4.88 or 9.76 kg/sq. m.). The 1.0 psf barrier shall exhibit minimum flammability ratings of 0.0 seconds from flame out and afterglow and 0.2 inch (5 mm) for char length when tested in accordance with Federal Test Std. No. 191-5903. The barrier shall have a minimum thermal conductivity "K" value of 0.29 and a rated service temperature range of -40°F to 220°F (-40°C to 104°C).

The barrier shall be Model KNM-100AL as manufactured by Kinetics Noise Control, Inc.

Pipe Wrap Detail

Pipe Wrap Detail