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What is Intumescent Paint?

Intumescent coatings, often referred to as intumescent paint or fire retardant paint, are used in buildings as a passive fire resistance measure. The key feature of intumescent paints is that they swell as a result of exposure to high temperatures, thus increasing in volume and decreasing in density. This makes the coating act as in insulator that keeps the high temperatures away from structural steel members. 

Jotun's range of Steelmaster Intumescent paints are amongst the most advanced in the world. Steelmaster 1200WF is the most efficient thin film water-borne intumescent paint for up to 180 minutes fire protection for steel available worldwide. Steelmaster 60/120 offers up to 120 minutes of fire protection for steel and can be applied both on and off site. Steelmaster 60WB gives 60 minutes fire protection of steel whilst also producing a low odour on application, making it ideal for use in confined areas.

As Steelmaster is a product that is used to protect lives, SML & Jotun take our obligations seriously and aim to ensure that all applications of Steelmaster products are done correctly. To ensure this, it is necessary to perform a calculation using sophisticated software to provide a detailed paint specification that takes into account the length of protection required, beam dimensions, degree of exposure and method of application.  We provide this service free of charge.  Please contact us on 01285 862132 before placing your order. If required, we are also able to provide a certificate of conformity, which, along with the paint specification will provide confirmation of fire protection provided that the specified film thickness of paint is applied.

More information is available in the Steelmaster Brochure, or alternatively you can contact us.


The industry’s most efficient thin film passive fire protection. Up to 180 minutes protection against cellulosic fire for infrastructure buildings.

From £142.00

Steelmaster 120SB is a solvent based intumescent coating that provides up to 120 minutes fire protection of structural steel exposed to cellulosic fire.

From £199.95


A solvent based, EPA VOC compliant thin film intumescent coating.

From £54.95

Steelmaster 60SB is a high-solid, single-pack, thin-film, intumescent coating. It is one of the latest additions to the Steelmaster range and has passed the toughest testing standards around the world.

From £150.00

A water based, EPA VOC compliant thin film intumescent coating.

From £37.95