Sonic Liner

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Product Details

Sonic Liner is a flexible Glasswool insulation blanket faced with an acoustically permeable black woven glass cloth on the air stream surface. A 35mm overlapping flange of the facing material is provided on both sides to enable effective sealing. It provides outstanding acoustical and thermal performance with low air friction.

Quality Management System

Isover products are manufactured according to ISO 9001:2000.

Features & Benefits

  • Life long energy savings
  • Excellent thermal & acoustic properties
  • Maintenance free
  • Minimal air friction while optimising free duct area
  • Safe application and use
  • The air stream will not erode or release fibers into the air stream under normal operating conditions

Fire Properties

  • Non-combustible - tested to SANS 10177 Part 5
  • Class 1 fire index rating - tested to SANS 10177 Part 3
  • Tested to ESTM E-84
  • Flame Spread Index: 20
  • Smoke Development Index: 10

Thermal Properties

Significantly reduces heat gains & losses.

Acoustic Properties

Offers exceptional acoustic properties & enhances indoor environmental quality by absorption of mechanical noise generated by air conditioning equipment. Sonic liner reduces the sound transmission along a duct.


Specially designed as an internal acoustical insulation liner for sheet metal ducts in heating, ventilation and air conditioning systems operating at temperatures of up to 120 deg C and air velocities up to 20m/s.


  • Odourless, inert and fully compatible with all standard building materials & components
  • Will not promote corrosion of steel, copper or aluminum
  • Will not sustain vermin
  • Will not breed or promote fungi, mould or bacteria
  • Non-hygroscopic
  • Prevents condensation on cold metal duct surfaces extending the life of the system

Physical Properties

Table to be inserted!

Handling & Storage

Store product undercover, and in dry conditions. Store flat. Handle with care, especially on the edges and corners, which can be damaged if subject to sharp or heavy impact. Do not apply excessive pressure, for example by standing or sitting on the product, as permanent damage may be caused.

Architectural Specification

Install (l5/25/5o)mm flexible non-combustible lightweight "Sonic Liner" as an internal lining in (heating/ventilation/air conditioning) duct system with the black woven glass cloth facing the air stream surface. Install in accordance with the manufacturer's detail & specification.

Additional Information

Technical Data

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