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A thin film intumescent waterborne coating for the fire protection of internal structural steelwork. It can provide up to 120 minutes fire protection and gives a durable and attractive surface, similar to a paint finish. It provides an ideal base for decorative top seals and in a fire it expands to many times its original film thickness.


  • Environmentally friendly.
  • Low odour.
  • Low VOC content.
  • Safe to use in confined spaces.

General information

Environmentally friendly

Low odour

Low VOC content

Safe to use in confined spaces

Uniclass 2015
Ss_40_90_40_42 Intumescent coating systemsPrimary
Specification data - Intumescent coating systems
Product Reference

Nullifire S707-120

Fire resistance to BS 476-21

90 minutes

120 minutes


Not required

Carbomatic 15LT

Aluminium epoxy.


General purpose, single pack zinc phosphate.


Water-based acrylic.

Topseal -

Not required

Carboxane 2000

Modified silane multi-polymer.

Nullifire TS-815

Solvent-based acrylic.

Nullifire TS-816

Water-based acrylic.

Nullifire TS-818

Water-based polyurethane.


Not applicable

BS 4800

Insert requirements.


Insert requirements.

Standard product features


Light Grey.

Technical properties:

  • Drying time (>10ºC): 12 hours.
  • Flash point: >55°C.
  • Solids content: 68% (± 2%).
  • Specific gravity: 1.37 (± 0.02).

Product Options


Applied to inhibit corrosion and to provide a suitable key for the basecoat. The choice of primer is dependent on the application and the substrate properties. Consult manufacturer's literature for more information.


Nullifire S707-120 basecoat can be left without topseal for one month, however for long term durability and external use, topseal is required. The topseal's available contain no fibres and are therefore suitable for areas where delicate electronic instruments are manufactured or used. The satin finish is easy to maintain by simply wiping clean with a damp cloth and any colour to a RAL or BS 4800 is available.

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