Jotun SteelMaster 120SB

UN1263 (Class: 3, Pk Grp: III)
A one component solvent based acrylic thin film intumescent coating.
Available in 20 Litres
£457.38 £381.15
In stock
Product Description

Jotun SteelMaster 120SB is a ready to use, independently approved, solvent based intumescent coating. It provides up to 120 minutes fire protection of structural steel exposed to cellulosic fire. It can be used as mid coat or finish coat in atmospheric environments and is suitable on approved primers on carbon steel substrates.

Best Uses

Jotun SteelMaster 120SB is specially designed as a reactive fire protection system for steel constructions. It is suitable for structural steel exposed to internal environments up to corrosivity category C4 (ISO 12944-2), with a compatible topcoat.

If you require a detailed coating specification please contact our Technical Team.


To secure lasting adhesion to the subsequent product all surfaces shall be clean, dry and free from any contamination. Application is by airless spray or Brush (for touch up only). Refer to the Application Guide (AG) for additional information.

IMPORTANT INTUMESCENT PRODUCT NOTE: Always contact Promain’s technical team prior to purchase to obtain a tailored project specification and the advice necessary. The information displayed on this website should only be used as a guide. Promain UK Limited will not be held liable for any resulting damage to property, human life or monetary costs incurred due to incorrect specification, preparation, application or maintenance that has occurred due to negligence by either the purchaser or applicator. This includes your failure to have contacted us to obtain the relevant advice/specification.

Technical Details

Approvals and Certificates

  • BS476 part 20/21
  • Additional Certificates and Approvals may be available on request.


  • Majority of steel sections covered
  • Easy airless spray application
  • Ready to use
  • Reduced application time
  • Reduced site costs

Technical Info

Components: Single Pack
Type: Solvent Based
Finish: -
Stock Colours: White
Tintable: No
VOC Content: 351 g/l
Volume Solids: 72 ± 3%
Suitable Substrates: Structural steel and carbon steel
Application Method: Airless Spray or Brush (Touch up only)
Theoretical Coverage: -
Wet Film Thickness (WFT): 280 - 1000 μm
Dry Film Thickness (DFT): 200 - 720 μm
Induction Time: -
Pot Life: -
Touch Dry: 30 minutes at 23°C
Overcoatable: After minimum of 8 hours at 23°C
Dry to Handle: 16 hours at 23°C
Cleaner / Thinner: Do not add thinner. The product is ready to use and should not be thinned. Clean tools with Jotun Thinner No. 7
Shelf Life: 18 months at 23°C
Packaging: Available in 20 Litres

The manufacturers data sheets are available for download from this website. It is your responsibility to read and understand all aspects of the data sheets before you place an order and prior to application. Please pay special attention to the preparation, mixing and application temperatures of the product, cleaning of substrate and environmental factors such as temperature, rain etc. Quoted coverage rates are based on the manufacturers theoretical rates and may vary depending upon substrates absorption, texture and application. We always recommend a test is carried out to ensure suitability.

Customer further agrees that Promain have no liability for any errors or omissions contained within the Product Data Sheets and are not liable for failure due to misapplication or inadequate substrate cleaning and preparation. For more information please refer to our Terms & Conditions.

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