To ensure the load-bearing capacity of the structure for 90 minutes or more, the most commonly used protection with boards is also the most affordable. For shorter fire protection time periods, we can choose from several types of protection, one being Promat’s reactive fire protective coatings.
Application costs and durability have been optimized in recent years through advances in product development and material innovations resulting in thinner solutions. Add this to the increasing number of suppliers entering the market and this system has now become a frequently used method for steel fire protection, alongside board-based systems.
Which intumescent coating to choose for your project?
Thanks to its wide experience in fire protection and, more specifically, in the protection of load-bearing structures, the R&D department of Promat has designed and developed two intumescent coatings consisting of resins and fillers with different performances and characteristics, to meet all the market needs. Both are fully tested according to European Standard EN 13381-8 (and can be used for profiles with an extremely high section factor (Ap/V).
PROMAPAINT®-SC3 is a water borne intumescent paint, CE marked by an ETA and tested for steel structures and concrete components according to European standards (EN 13381-8 for steel and EN 13381-3 for concrete). The coated steel or concrete components achieve fire resistance classes from R(EI) 15 to R(EI) 180. This product is mainly used for the high fire resistance classes and for hollow section circular and rectangular steel sections (both beams and columns).
PROMAPAINT®-SC4 is a single component intumescent paint in water emulsion consisting of synthetic resin especially formulated for steel structures, CE marked by an ETA and tested according to European standards for steel, concrete and composite loadbearing slabs (EN 13381-5). The coated steel components achieve fire resistance classes from R 15 to R 120. This product is mainly used to achieve medium-low fire resistance with excellent performance for R 30-60 on an open steel profile.
Both have a wide variety of uses inside of buildings and in open halls, and are intended for all conditions (internal, semi-exposed and exposed) according to ETAG 018-2 used as EAD and the most recent EAD 350402-00-1106.
PROMAPAINT® products can be specifically used in areas where the application of solvent-based products is perceived to be an environmental hazard, such as hospitals, health care centres, schools, public buildings or in fact any building that is occupied or attached to occupied areas, and provide the following benefits for the customer:
- aesthetic benefits for projects where the exposed steel structure is an important design feature (the steel elements remains visible)
- thin and seamless result, because of lower application layer thicknesses
- up to 750 microns (Dry Film Thickness) in one coat by spraying
- easy to apply
- can be repainted and repairs do not compromise the fire resistance, according to the official fire tests
- durable, lightweight coating
- suitable for galvanized steel structures
- topcoat not necessary for indoor applications with low humidity (Z2)
- fully exposed (X) with suitable topcoats
- tested and approved for open and hollow steel sections for fire protection up to R(EI) 180 (PROMAPAINT®-SC3) and up to R 120 (PROMAPAINT®-SC4)
- improving the fire resistance of loadbearing brick and reinforced concrete members (only PROMAPAINT®-SC3)
- solvent free, extremely low VOC
The property of being intumescent means that the material swells as a result of being exposed to heat, thus increasing in volume and decreasing in density. Specifically, an intumescent paint is a coating that reacts to heat by swelling in a controlled manner, expanding between 40 and 200 times its original thickness, producing a carbonaceous char formed by a large number of small bubbles that act as an insulating layer to protect the substrate.
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