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Professional Fire Protection

Specialist fire protection coatings, with free technical advice from our team.

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About This Range

Professional Fire Protection Coatings

Intumescent systems for structural steel, interior timber and concrete, for contractors, specifiers and trade buyers.

This range brings together the specialist fire protection systems we supply: HENSOTHERM and HENSOMASTIK coatings from Rudolf Hensel, the CHAR 17 clear system from Iris Coatings, and Flametect products for trade use.

Each coating works as part of a system with its primer and, where needed, a top coat. The product pages and Technical Data Sheets set out the right combination for each substrate and fire rating.

Choose by Substrate

  • Structural steel: HENSOTHERM 471 KS and HENSOTHERM 461 KS
  • Interior timber, clear finish: HENSOTHERM 1 KS INNEN or Iris CHAR 17
  • Interior timber, coloured finish: HENSOTHERM 2 KS in white matt or anthracite grey
  • Concrete: HENSOTHERM 820 KS and HENSOMASTIK B 3000
  • Resins and latex moulding: Flametect M-APP flame retardant additive
  • Primers, top coats and HENSOMASTIK K 2000 heat-resistant adhesive

Specifying a System

Tell us the substrate, the fire rating you need and the area or steel sizes involved. The amount of coating depends on the element and the fire resistance period, so project details help us point you to the right product.

The HENSOTHERM steel coatings are for application by trained personnel.

Certifications & Performance

Steel: HENSOTHERM 471 KS, R15 to R180, BS 476 (Certifire CF 5344). HENSOTHERM 461 KS, R15 to R90, BS 476 (Certifire CF 5678).

Concrete: HENSOTHERM 820 KS, up to R240 for flat ceilings and walls, and HENSOMASTIK B 3000, up to 120 minutes, both tested to EN 13381-3:2015.

Timber: HENSOTHERM 1 KS INNEN, B-s1, d0 to DIN EN 13501. Iris CHAR 17, Euroclass B-s1-d0 to EN 13501-1 on wood-based substrates of 10mm or more.

Talk to Our Team

Free technical advice on choosing and quantifying a fire protection system for your project.

Contact Us | Call 02920 026582

Frequently Asked Questions

HENSOTHERM 471 KS covers R15 to R180 for open and hollow sections. HENSOTHERM 461 KS covers R15 to R90 for columns and R15 to R60 for beams and hollow sections. Both are approved to BS 476 under Certifire.
Both are clear intumescent coatings for interior timber. HENSOTHERM 1 KS INNEN achieves B-s1, d0 to DIN EN 13501 and is top coated with HENSOTOP 84 AF. Iris CHAR 17 achieves Euroclass B-s1-d0 on wood-based substrates of 10mm or more and is finished with CHAR 17 Finish.
HENSOMASTIK B 3000 is weatherproof to DIN 1048 for indoor and outdoor use, including car parks. HENSOTHERM 820 KS is for indoor use.
Yes. Call our team on 02920 026582, Monday to Friday, 9am to 4:30pm, with the substrate, fire rating and area, and we will help you choose the right system.
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