Recommended: Sika Pyroplast range of intumescent paints & varnishes for wood. Sika Pyroplast Wood T provides spread-of-flame protection and delays the inflammation of internal natural wood derivates. Timber: Intumescent paint and Intumescent varnish for timber is designed to increase the fire performance of the timber substrate in two different ways, firstly it can decrease the surface spread of flame to a British Class 0 and also a Euro Class B and secondly on substrates of a minimum thickness we can increase the fire performance to 30 minutes or in some cases 60 minutes.Recommended: Nullifire SC802 Intumescent Basecoat is a water-based, white, thin film intumescent coating for the protection of internal structural steelwork & can provide up to 60 minutes fire resistance. By correctly protecting steel, it exists in a state of ‘Elasticity’ which allows the steel to bend/deflect and return to its original state once the force has been removed. At this point steelwork loses its structural load bearing capacity and can buckle causing a building to potentially collapse. During a fire it can just take a few minutes for the temperature of unprotected steel work to reach 550☌. The paint works by intumescing or expanding to create an insulation barrier on the steel and increasing the time period to 60, 90 or 120 minutes. Steel: Intumescent steel paint is designed to increase the time period that a structural load bearing steel within a building will last during a fire.Intumescent paint comes in three different types: steel, timber and plaster: In summary, intumescent paint thermally insulates structural materials such as steel and timber in a fire, stopping premature collapse of the building and slowing down the fire. Intumescent paint not only prevents this from happening, but it slows down the spread of a fire, giving more time to evacuate buildings safely and thus potentially saving lives. In a fire it is critical that the structural frame of the building is protected correctly so that the materials do not reach their critical failure temperature, potentially causing the building to collapse. In the case of an intumescent paint, when subjected to temperatures exceeding 120☌ the paint will intumesce (swell up to 50 times the thickness of the paint) and form a carbon layer (Char) which, thermally insulates the material for a given period of time: 30, 60, 90 or 120 minutes. When the paint is subjected to heat it will react.
Intumescent paints are what we refer to as “Reactive Paints”. News | intumescent paint Intumescent Paint: How Does It Work And Why Is It Needed? Intumescent Paint Definition
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