Intumescent Basecoat - Off-Site, Solvent-Based

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SC604 is a borate free, high solids, low VOC single pack acrylic thin film intumescent for the protection against fire of structural steelwork, optimised to provide 60 minutes fire resistance.


SC604 is optimised to provide 60 minutes fire resistance to ‘I’ section beams and columns, hollow columns and beams, as well as cellular beams, concrete filled hollows and solid rods. Limited 90 minute is also available. SC604 can be used on steel, cast iron and galvanised steel. On-site, standard dry version, SC605, is also available.

Safety data sheet must be read and understood before use. Flammable - keep away from open flames and other ignition sources.

  • Competitive loadings.
  • Compatible with various primers and top seals.
  • Easy to apply.
  • Fast drying times.
  • On-site grade, SC605, also available.
  • Optifire®+ unique traceability identifier.
  • CE ETA 21/0683.
Nullifire Application Instructions SC600 Series (en-GB).pdf Application Instructions
Nullifire Intumescent Coatings Brochure (en-GB).pdf Brochure
SC604 Declaration of Performance (en-GB).pdf Declaration of Performance
SC604 Safety Data Sheet (en-GB).pdf Safety Data Sheets
SC604 Technical Data Sheet (en-GB).pdf Product Data Sheets