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Intumescent Acoustic Mastic - Fire and Smoke Sealant


Intumastic ADL is a fire-resistant and acoustic sealant, made of medium viscosity, fire-rated mastic for internal use, containing acrylic emulsion inert fillers and fungicide. Suitable for fire and smoke sealing around cables, steel pipes, copper pipes, cable trays, combustible pipes, dampers and ducting, it also provides sound insulation. Intumastic ADL supports fire sealing in linear joints between substrates in compartment locations. It is also tolerant of building movement, offering a movement capability of up to 30%.

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products benefits:

Integrity and insulation of up to 240 min

May be over-painted using acrylic paints

Air pressure tested up to 2000 Pa

Acoustic insulation up to 61 dB

Tech info:

  • Joint widths

    0 to 35 mm linear; 30 to 150 mm movement details

  • Depth to width ratios

    1:1 walls and floors; 2:1 split wall seals

  • Tack free time

    15 to 60 minutes, depending on temperature/humidity

  • Colour


  • Full Information:

    Check out the full
    datasheet available in
    the Downloads section!

More Info

Fire Testing

• Tested at Exova BM Trada to BS EN 1366-3/4
• Tested at Exova Warrington Fire to BS 476 Pt 22
• Third party accredited by Exova Warrington Fire, certificate number CF 578