Tērauda konstrukciju ugunsaizsardzība

Intumescent coating solutions for steel structures

Passive fire protection of structural steel is achieved by protecting the steel structures with intumescent coatings.  

Passive fire protection concentrates on protecting the structures with e.g. intumescent coatings that prevent the spread of fire to delay possible structural collapse allowing time for evacuation. Intumescent coatings is often highly recommended in projects with critical structures.

Passive fire protection is an essential part of a fire protection system that is essential part of a building’s safety plan. A fire protection system help protect the building and the people inside the building during fire.

Intumescent coatings

Saving lives, assets and the environment with intumescent coatings

Intumescent technology, i.e. fire protection is based on the paint surface expanding when exposed to heat. Tikkurila’s intumescent coatings help save lives and assets and prevent environmental damage.

Our intumescent coating solutions provide efficient fire protection for constructional steel work that fulfill the requirements of the required fire class. Together with intumescent coating we have variety of compatible primers and topcoats. Tikkurila’s intumescent coatings provide competitive film thicknesses, for open and closed profiles and a wide range of systems.

Our intumescent coating product,  Fontefire ST 60-1 is a water-borne, one-component, intumescent paint for steel surfaces. It provides efficient fire protection for constructional steelwork.

What are intumescent coatings based on

Because steel structure can reach +500°C in under 15 minutes, it requires protection to avoid losing its strength, leading to collapse. It’s important the intumescent has to perform as fast as possible to be effective.

An intumescent is a thin-film coating which is inert at low temperatures (under + 200°C) but reacts with heat. When subjected to heat intumescent coating is rapidly transformed through sublimation, and expands many times its original thickness and forms an insulating layer of foam. The resultant layer of foam reduces the conduction of heat from the fire to the substrate, delaying the time to reach structural failure. The foam has the ability to remain in site during any movement of the steel, such as expansion or deflection, giving critical time to escape and evacuate.

The insulating layer of foam has very good heat insulation properties, it’s spongeous and porous, and can reach up to 50 mm of thickness.


Tailored coating solutions you can trust

We work with you to understand the full life cycle of your product and identify opportunities to improve efficiency by reducing costs, accelerating project schedules, and carefully managing the supply chain. Our technical services experts are ready to support you with achieving your business goals.

Our technical service experts are helping you for selecting the right systems and providing help with selecting the right film thickness. Try out also our easy-to-use film thickness calculator.

Intumescent calculator for steel


Want to know more about our solutions for intumescent coatings?

Our team is ready to answer all your questions.

Contact us

Tests and standards

Our products and systems are tested to ensure they perform as promised in industrial applications.
  • Fire tests (EN 13381-8)
  • ETA approval
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