Intumescent Basecoat - On-Site, Water-Based

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SC801 Intumescent Basecoat is a water-based, white, thin film intumescent coating for the protection of internal structural steelwork, offering up to 120 minutes fire resistance.

Fire Rating: 120 Minutes


SC801 provides up to 120 minutes fire resistance to ‘I’ section beams, columns, hollow section columns and cellular beams. SC801 can be used on steel, cast iron and galvanised steel.

The following instructions are for on-site application only. For off-site application, refer to Nullifire. Ensure that: • The primer is compatible with SC801-120 and has been applied correctly. • The overcoating period for the primer has not been exceeded. • The correct primer is used for galvanised steel. • All damage to the primer has been repaired & re-primed. • Site and weather conditions are within specification. • S801-120 has been stored correctly. • Surface is clean, dry and free from contamination. • Correct spray equipment is available, if appropriate. • Application instructions have been read prior to commencement of work. • Ensure different basecoats are not applied on the same section of steel. • Equipment should be clean and free from contaminants or dried material. • Wet film gauges are available for use.

Safety data sheet must be read and understood before use.

  • Water-based intumescent coating suitable for internal use on structural steelwork for up to 120 minute fire resistance.
  • Easier to apply product for greater efficency on site with improved smooth matt finish.
  • Compatible with a full range of Nullifire primers and top seals.
  • Very low VOC.
  • Optifire®+ unique traceability identifier.
  • Certifire CF5365.
Nullifire Application Instructions SC800 Series (en-GB).pdf Application Instructions
Nullifire Intumescent Coatings Brochure (en-GB).pdf Brochure
SC801 Safety Data Sheet (en-GB).pdf Safety Data Sheets
SC801 Technical Data Sheet (en-GB).pdf Product Data Sheets
Nullifire Specification Control Guidance Note (en-GB).pdf Guidance Notes