Thermobreak® Acoustibox


Thermobreak® Acoustibox Cushion Head boxes are manufactured using a unique proprietary composite foam which is a 3 in 1 product. It is strong and stiff, eliminating the use of a heavy steel, and provides excellent thermal and acoustic properties allowing a single material be used to manufacture the cushion head box.

Product Literature


  • As there is no metal, it is lightweight eliminating the need for rafter rod supports.
  • Manufactured with various thicknesses to comply with NCC R values.
  • Robust and strong allowing for ease of installation with minimal damage.
  • Manufactured to fit the neck of all common registers.
  • Can be supplied pre-assembled or flat packed in a two component pack for cost saving of transport.

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Head office:
Building 4, Savill Link
113 Savill Dr
Favona 2024
Auckland New Zealand

Ultralon Foam Group is a Skellerup Group company