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iNtumescent coatings

Intumescent coatings provide an expanding insulative layer that is designed to extend the resistance steel has against heat and prolong structural adequacy in the event of a fire. 

Metspray’s expertise in this sector ensures that we can apply all types of intumescent coatings to your project whilst meeting the stringent requirements of the FPANZ Code of Practice for the Specification and Application of Intumescent Coatings for the Fire Protection of Structural Steel. With the increase in demand for intumescent coating systems, due to their performance and architectural finishes, Metspray is not only able to carry out their application in-shop or onsite, we can also assist in project managing the scope of works to ensure that your project timeline is maintained. With our team of experts and our facility that can handle items of all shapes and sizes, we will see you right. We can even come to you, with our dedicated site team and mobile plant to see the job is done right - first time, every time.

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What are intumescent coatings? Intumescent coatings offer a level of passive fire protection (PFP) to the structural adequacy of steel. They temporarily insulate key elements and components from the heat of a fire. They work by expanding to produce an insulating char layer when exposed to heat greater than 200°C. This layer slows the transfer of heat into the steel. Intumescent coatings can provide steel with a fire resistance rating of up to 240min (240/--/--). As intumescent coatings are passive fire protection, they are intended to buy time and delay the effects of fire to the structural integrity of steel. They should be used to form part of a total system supported by active fire protection: such as sprinklers, extinguishers, and other passive fire protection systems.

What type of intumescent coatings are there? There are 2 generic types of intumescent coatings: a)Thin-film intumescent coatings – generally solvent or water based single pack, these are comparatively easy to apply, and often have a good aesthetic finish. They are primarily used for internal applications, however some products, especially hybrid products, can be suitable for exteriors up to a C4 environment. b)Thick-film intumescent coatings – these are often, but not exclusively, epoxies. These are used on exteriors, in severe environments, and/or where high fire resistance is required. They are more commonly applied in-shop but with careful planning can also be applied onsite.

How long do intumescent coatings last? Depending on the environment, intumescent coatings can last from 10 years to the life of the building. A robust maintenance plan should be in place to routinely inspect and remediate any damages to the coating.

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