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Thursday, 17 October 2019
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Raw materials & technologies, Technologies

Fire resistant coating now approved for concrete

Wednesday, 5 November 2014

A fire resistant coating has been approved for use with concrete structures, offering advances in safety and time of construction projects.

The water-based intumescent coating brings benefits to contractors needing to protect concrete. Source: Stefanie Bandmann/Fotolia

The water-based intumescent coating brings benefits to contractors needing to protect concrete. Source: Stefanie Bandmann/Fotolia

Specifically developed to allow easy and fast airless spray application on structural steel, "Firetex FX5120" is a water-based intumescent coating which brings benefits to contractors needing to protect concrete. Sherwin-Williams Protective and Marine Coatings division developed the product to offer cost and time savings, with the advantage of not causing or releasing dust and fibres while in service as the product’s paint coating is bound with an acrylic resin.

Weight and space savings

The coating offers approval under EN 13381 Part 3 for concrete structures. Tests show that 1.5mm of the coating can increase the fire resistance of a concrete structure by as much as 35mm of concrete. Concrete has some degree of inherent resistance to the effects of fire, retaining its structure even when exposed to a fire fuelled by cellulosic material such as wood or paper. However, in older buildings where the fire protection needs to be enhanced, architects would traditionally increase the thickness of the concrete, install mineral fibre boards or turn to spray-applied mineral fibre products.

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