Applying Fire Rated Intumescent Paint on Gypsum

Gypsum Products for Fire Resistance

In construction, gypsum is used as a heat-resistant, sound absorbing, moisture-preserving, and fireproofing material. Gypsum is also used in partition and ceiling structures for decorative purposes. This material is often the first choice for wall-surface putty, finishing mortar, ceilings, and plasterboard partitions, among others. Many contemporary exteriors and interior construction structures contain gypsum products.

Gypsum boards, also known as drywall, are regarded by many as the best building material for ceiling, wall, and partition systems in commercial and residential buildings. An important advantage of gypsum drywall is resistance to fire, as the product contains water which is released as steam, slowing the heat transmission.

Gypsum Drywall: Regular Board vs. Type X vs. Type C

The regular gypsum board has a naturally occurring fire resistance while Type X gypsum drywall contains several additives, including glass fiber reinforcement that gives it additional fire resistance. Another type of drywall is Type C, which is distinct from Type X in that it contains more glass fiber reinforcement as well as other ingredients that make the material more resistant to fire compared to regular and Type X gypsum.

In many jurisdictions, installation of fire rated drywall is required by building codes on the exterior and interior walls that are in proximity to utility rooms and furnaces. In commercial buildings, fire rated gypsum drywall are necessary for most of the walls and ceilings in order to meet building code requirements.

Intumescent Paint in Action

Intumescent coating products often come in the form of fire retardant paint and intumescent fire rated paint. Fire retardant paint releases flame-damping gas in response to heat, reducing in this way the spread of flames. Intumescent paint, on the other hand, responds to high temperatures by swelling for up to 50 times the original thickness of the paint and insulating the gypsum substrate. While gypsum boards have a naturally occurring fire resistance, they can be used in combination with other products in order to achieve a higher hour fire rating.

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Our fire resistant paint can help you achieve a higher fire rating when used in conjunction with gypsum, raising the rating on any sheet of gypsum and often eliminating the need to tear down existing layers, hang additional sheets of drywall, or create significant messes in finished spaces

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Technical Data

FlameOFF® intumescent coatings provide the installer an easier application of the intumescent coating and offer design professionals many benefits.

Listings

The performance criteria as set out in a building code are clear and unambiguous, and need to be tested by an independent third party. Our tests are done by national accredited testing laboratories. Their unbiased results are the basis for our certification listings.

FlameOFF® Fire Barrier Paint has been tested to ASTM E119 Fire Endurance requirements to meet the Full Scale requirement of IBC/NFPA Building Codes.

FlameOFF® Fire Barrier Paint is 3rd party listed with ICC-ES for E84 Plenum and E119 for 1 and 2 hours, full scale and load bearing test.

IMPORTANT CONSIDERATIONS

Fire Barrier Paint is a good option to consider when the coating product needs to be applied to custom or irregular areas, including in situations where there is not enough space to install additional layers of gypsum.

FlameOff® Fire Barrier paint can also be considered when aesthetics are important, such as in residential and commercial applications.

Fire Barrier paint can be top-coated by a layer of latex paint of any color. Even without the top coat, FlameOff® FireBarrier paint has a smooth eggshell-like texture.

Our intumescent paint is convenient in terms of simplicity, as it can be applied on gypsum with a brush, or spray machine, and this application is by order of magnitude faster and cheaper comparing to other traditional fireproofing methods, like additional gypsum or mortar.

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Faq
For Gypsum applications, no primer is required. Contact our technical team for a recommended primer if needed.
We recommend application with a commercial grade airless paint sprayer with a minimum operating pressure of 2000-3000 PSI. With this type of application, you can achieve the smoothest finish and, at the same time, deliver the maximum amount of material per coat. This product can also be brush applied.
FlameOFF® Fire Barrier Paint is tested over bare or primed surfaces only. For this reason, approval for use over a painted substrate is at the discretion of the building official. Existing paints must be clean with no cracking, peeling or flaking. A pull test to verify adhesion may be performed. It is recommended to rough the surface of the existing coating to create better adhesion between the existing paint and the intumescent coating.

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