Uses of a Vermiculite Spray NSW

A Fire Spray NSW or an intumescent coat works like a passive specialist paint for protection from fire which chemically reacts once heated because of fire. The coat expands in its form and size for forming char that helps in protecting the steel structure for some time.

Why is intumescent coating required?
The whole purpose of passive fire safeguard and safeguarding the structural steel work is given the occupants of the building some time to quit the building. Steel is considered to be strong and a very versatile material for building. But, at a temperature of 550 degrees it starts losing the structural integrity.
Intumescent paint meant for protection of steel is usually very thick as well as opaque and it’s finished with a very thin coat of protective fire retarding spray which looks just like gloss. The intumescent coats are generally applied through airless spray for providing a very smooth finish that remains to be stable at an ambient temperature. These compositions of coating are generally based on the organic resin binder, which is acrylate epoxy or rubber.
Once dry, the passive fire intumescent coat forms a reactive layer. Thus it’s extremely important to get the right thickness of this dry film for obtaining the needed fire resistance. The thickness of the film is assessed wet with the help of wet film gauge. As the thickness of the wet film would try out the specific film. Several coats might have to be used for building the totally dry coating thickness for giving the requisite protection from heat or fire.
The resin would be filled with some active ingredients which would react in the fire at a temperature around 250 degrees for forming thermally insulated char or a foam. The char may swell up toabout 50 times of the original thickness of the coating.
As already mentioned, the basic formula of the passive fire protecting intumescent spray comprises of the carbnific, organic binder, specific agent, blowing agent, etc. that may be melamine or maybe derivative of melamine formaldehyde which is a source for acid catalyst like ammonium polyphosphate. It is also a char reinforcing component.
With a rise in temperature, the binder also starts melting down and blowing agent starts liberating gases which causes controlled expansion. At this point of time, degradation of backbone of carbon also happens and a fusion of inorganic reinforcement material results in solidification of char.
In today’s age when the commercial buildings are made with glass or steel, the exposed steel work is many a times an integral feature of the design. A Vermiculite Spray NSW allows the steel structure to be utilised as design feature while following the regulations of the building.
An intumescent passive coating offers the steel structure with protection from corrosion, protection from fire and visual decoration element if needed.
Until a few decade ago, the airless units for the application of the intumescent coats used to be pneumatic pumps which have air motors and are capable enough of offering about 4,000-5,000 psi at pump.