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Intumescent coatings for passive fire protection

All commonly used building materials lose strength when exposed to high enough temperatures. In extreme cases, even steel can buckle and collapse in a matter of minutes. Hempel’s HEMPACORE range of intumescent coatings insulates structural steel to ensure your structure remains sound for longer.

Our HEMPACORE intumescent coatings can be used on a wide range of structures - from the steel frames of sports stadiums to airports and skyscrapers - and can ensure structural integrity in the case of fire for up to two hours.

How do intumescent coatings work?
Although applied in thin coats, intumescent coatings expand when exposed to high temperatures (roughly 200℃) to produce an insulating carbon char. This char insulates the material beneath it so it can maintain its load-bearing capacity for longer.

Intumescent coating systems are specified by the length of time that they protect a structure (usually 30, 60, 90 and 120 minutes). The duration of the protection depends on a number of factors, including the film thickness and the steel profiles the system is protecting.

Simple application off-site or on-site
Intumescent coatings offer a number of advantages compared to other passive fire protection systems, such as concrete casing or fire-resistant boards. They are quick to apply to steel structures either on or off-site.

They are also extremely thin, leaving more room for ceiling and wall fixtures, and easy to maintain.

Testing and quality control
All our intumescent coatings are thoroughly tested to ensure reliable and lasting performance, both in our labs and by independent specialists and international standards boards.

Our production facilities undergo yearly inspections to ensure they meet the required quality and certification requirements. Our raw materials are tested to strict requirements. We also employ state-of-the-art line quality control and regularly test batch samples in our in-house furnaces to ensure product quality.

Choosing the best intumescent coating solution
Effective intumescent passive fire protection systems depend on the combination of the primer, intumescent coating and topcoat. The correct choice of coating system depends on many factors, from the


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