• Firetherm Intumastic ADL

Firetherm Intumastic ADL


We no longer stock this product, but can recommend Nullifire FS702 Intumastic Fire Resistant Acrylic Sealant as a great alternative.

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This Product has been Discontinued


We no longer stock this product, but can recommend Nullifire FS702 Intumastic Fire Resistant Acrylic Sealant as a great alternative.

Intumastic ADL is a medium viscosity, fire rated mastic for dry internal use only, containing acrylic emulsion, inert fillers and fungicide. The mastic is tolerant of building movement and is fully tested for up to 240 minutes integrity and insulation. Tooling off easily with water, Intumastic can be over-painted with acrylic paints once fully cured and has a tack-free time of 15 to 60 minutes, depending on temperature/humidity. Use to seal from smoke and fire around:

  • Cables and cable trays, baskets
  • Steel and copper pipes
  • Combustible pipes
  • Dampers
  • Ducting
  • Linear joints between substrates in compartments
  • Floor movements
  • Bonding and pointing Intubatts
  • At the head of walls

In movement joints, Intumastic ADL offers a movement capability of up to 30%. Air pressure tested up to 2000 Pa, acoustic up to 61 dB.


  • 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.

Maximum Openings

  • Maximum wall opening 35 mm x infinite length (linear gap)
  • Maximum floor opening 35 mm x infinite length (linear gap)
  • Maximum opening in movement seal 200 mm x infinite length


  • 1:1 ratio wall 240 minutes integrity; 240 minutes insulation
  • 1:1 ratio floor 240 minutes integrity; 240 minutes insulation
  • 3 mm over 100 mm Firetherm Backer 240 minutes integrity; 240 minutes insulation; 30% movement.
  • 10 mm angled fillet to Intubatt edges or full depth plus fillet around services.


  • 10 mm wide seal - 3.25 m approx.
  • 15 mm wide seal - 1.35 m approx.
  • 20 mm wide seal - 0.78 m approx.

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

IMPORTANT FIRE PRODUCTS NOTICE:  The information displayed on this website should be used as a guide ONLY and  our Technical Department should be contacted to obtain a tailored specification and any advice necessary before you place an order for fire protection products. Fire protection products are non-returnable except in accordance with  Condition 8 of the Terms and Conditions .  We will not be held liable for any resulting damage to property, human life or monetary costs incurred due to the incorrect specification you have prepared or use of fire protection products caused by your negligence, including your failure to have contacted us to obtain the relevant advice/specification.

Product Details

Data sheet


Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.

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