DC 315 Characteristics:

5 Gallon Pails or 55 Gallon Drums
All orders ship in Ice Gray (White and Dark Gray available via special order)
47 g/l

Competitive Advantages of Using DC 315 Include:

DC 315 is the most tested and approved product in the world for use as an, “Alternative Barrier Coating System" over Spray Polyurethane Foam (SPF)

Visit us at our website to obtain a current matrix of all the manufacturer's  foams DC 315 has been tested and approved over as Thermal and Ignition barriers in compliance with current IBC codes.

If a coating has not passed a full scale test on a manufacturer's foam it cannot be used on that foam; there are no exceptions in the IBC Code!

All coatings must pass a full scale test on each of the manufacturer's types of open and close cell foams. Manufacturers like Bayer, BASF, Henry, Lapolla, Gaco, Quadrant, Icynene, Premium, NCFI, SWD, Rhino Linings, SucraSeal (SES), etc., must be individually tested to be used as a protective 15 minute thermal barrier coating.  If a coating is not tested it cannot be used.

Building Code Fire Performance Requirements for (SPF):

The International Building Code (IBC) mandates that SPF be separated from the interior of the building by a 15 minute thermal barrier, or other approved covering. DC 315 passed certified NFPA 286 and UL 1715 over a variety of open and closed cell spray applied urethane foams that were conducted by ISA certified testing facilities.  All tests performed complies with the requirements of 2006 IBC Section 803.2.1 & 2009 IBC Section 803.1.2, and Section 2603.9; 2012 IBC Section 803.1.2 and Section 2603.10 under "Special Approvals for Thermal Barriers over Foam Plastics".  DC315 is WHI marked and certified via 3rd party inspection for quality assurance and consistency.

Special Approval / Alternate Thermal & Ignition Barrier Assemblies[IBC2603.9/IRC R316.6]

Alternate Assemblies (e.g.Exposed SPF or SPF with a Thermal Barrier Protective Covering)

The assembly must remain in place for 15 minutes during specified large scale fire tests, such as NFPA 286,UL1715,UL1040,or FM4880.

Special Approval for Alternative Ignition Barrier Assemblies

DC 315 meets the requirements for ignition barrier per AC 377, Appendix X

In order to validate warranty and confirm the installation complies with IFTI’s best practices installer must obtain and read all current installation documents. Installation documents include Application Guide, Ventilation Guide and Job Work Report.  These documents can be downloaded at or by calling IFTI at 949.975.8588.  “Job Work Records are an excellent way to track your installations and confirm compliance to your Building Official or Authority Having Jurisdiction. In the event of a concern on a job the installer is able to provide documented proof of the installation, for this reason IFTI recommends using these forms for all thermal barrier jobs.”

Prior to Applying DC 315 to Ensure Proper Adhesion: Adhesion of a coating to SPF requires the foam surface to have a slight profile or texture similar to an orange peel (view below).  Smooth or glossy foam surfaces should be flash coated with a light 3 - 4 mils Wet Film Thickness (WFT) of DC 315 before applying the full application.  Flash coating is a quick burst of DC 315 or a primer via airless sprayer over an area needing treatment.  We also recommend flash coating around all pipes and air ducts.


Orange Peel Surface Texture: Description: The surface shows a fine texture and is compared to the exterior skin of an orange. This surface is considered acceptable for receiving a protective coating.


Coarse Orange Peel Surface Texture: Description: The surface shows a texture where nodules and valleys are approximately the same size and shape. This surface is acceptable for receiving a protective coating because of the roundness of the nodules and valleys.


Smooth Surface Texture: Description: The surface shows spray undulation and is ideal for receiving a protective coating.

Spraying DC 315 for Maximum Yield: If this is the first time using DC 315 we suggest testing a pre-measured are a to get a feel for spraying and yield. Example, if the job requires 20 wet mils or 80 sq.ft. per gallon, then a 5 gallon pail would cover 400 sq.ft. Measure out one or two 400 sq.ft. sections using pieces of tape, thumbtacks, or canned spray paint. Use just enough too utline the area you intend to apply DC 315. We suggest spraying inside the outlined area and taking wet film thickness measurements, with a wet film gauge across the area ,to get a feel for maximum yield.


Sq. Ft.Per One Gallon

Sq. Ft.PerFiveGallon


400Sq. Ft.Per One Gallon

2000Sq.Ft. PerFive Gallon


89Sq. Ft. Per One Gallon

445Sq. Ft. PerFive Gallon


80Sq. Ft. Per One Gallon

400Sq. Ft. PerFive Gallon


76Sq. Ft. Per One Gallon

380Sq. Ft. PerFive Gallon


73Sq. Ft. Per One Gallon

365Sq. Ft. PerFive Gallon

Overlapping Technique: The overlapping technique ensures that an even amount of coating was sprayed onto the surface. The spray gun should be aimed so that the tip points at the edge of the previous stroke, therefore overlapping each stroke by 50%. To maximize efficiency when spraying on broad and open surfaces (e.g. ceilings and bare walls), the outside edges of walls should be sprayed first. The middle can then be sprayed quickly requiring less precise strokes.  Given the contour of SPF we suggest spraying side to side followed by an up and down stroke.


Wait 12-24 hours to let foam off gas and cure before applying DC 315:

Temperature: PROTECT FROM FREEZING DURING SHIPMENT AND STORAGE. DC 315 is water based coating which will freeze and become unusable at temperatures below 32 F. Do Not store material at temperatures below 50 F. Do Not apply DC 315 when ambient air and substrate temperatures fall below 50 F. Store DC 315 at 50 F to 80 F at all times.  Do Not store DC 315 on concrete floors during winter months. IFTI recommends an ideal installation temperature range of 62F to 90F.

Humidity: Relative humidity like temperature plays an equally important role in how well DC 315 cures. Ideal conditions are 50-65% relative humidity. Curing times are significantly affected when humidity levels exceed 70%. Low relative humidity can also be a problem, because DC 315 may dry too quickly and lead to blistering on the surface. It is imperative that humidity is monitored throughout the application and curing process. 65% humidity at the beginning of the job will quickly rise as the coating is installed. Continue monitoring humidity as the coating cures until equilibrium is achieved. For additional information on applying DC 315 in high or low humidity contact IFTI at 949.975.8588 or email us at

Ventilation: Please see humidity and temperature guidelines above. We recommend running fans to circulate the air during application, especially in high or low humidity. Air flows must be across the area DC 315 was applied, but not directly on it. If the relative humidity is greater than 65% at the end of spraying and cross ventilation is not drastically reducing it, then a mechanical industrial dehumidifier is required. IMPORTANT- when spraying in enclosed spaces, particularly those that have just been insulated with an air barrier material like SPF, it is mandatory to use an “exhaust” blower at one end of the enclosed space and run a hose to the exterior of the building for removing stale air.    Use a “supply” blower at the opposite end of the enclosed space and a hose from the exterior to maintain a negative pressure compared to the surrounding area, maintaining at least 0.3 air changes per hour following application until coating has fully cured. Improper installation practices that do not address humidity will void the warranty. Contact IFTI at 949.975.8588 or email for a current ventilation guide.

Freezing: It's also important that air temperatures do not drop below 50⁰ F in the work space until the coating has fully cured. Curing paint can still contain moisture that will crystallize in sub-freezing temperatures instead of evaporating out into the atmosphere as it is designed to do. If temperatures do drop, you won't see a problem until the following spring or as temperatures rise. Moisture will remain hidden in the coating over the winter and then migrate to the surface under a warm spring sun, which may form blisters or delamination.

Surface Preparation: All surfaces to be coated must be clean, cured, firm, dry and free of dust, dirt, oil, wax, grease, mildew, and efflorescence. The quality of any application is only as good as the surface preparation that precedes the application. Our coating has excellent bonding characteristics and will adhere to most sound, clean, foam surfaces. Verify that the surface of the foam is free of gouges, holes, and exposed cells. Also verify the surface is stable, and not crumbling or deteriorated. If any such defects are found make sure to repair them prior to proceeding.

Material Preparation: DC 315 must be thoroughly mixed before application.  Failure to do so will seriously compromise the coating’s ability to perform. It is recommended to perform mechanical stirring with a high speed drill and a paddle appropriate for the size container you are working from. Contents should be stirred from the bottom up making sure to scrape the bottom and sides with a paint stick as you go. Contents should be stirred to a creamy consistency with no lumps. Continue mixing for 4-5 minutes per 5 gallon pail. Thinning is usually not needed. If DC 315 has been exposed to high heat, water may evaporate from the plastic 5 gallon container. If the paint level is below 3 inches from the top of the container, add enough water to bring the level back up to within 3 inches from the top in order to ensure proper consistency.

Application Equipment: DC 315 is best applied with an airless sprayer to achieve a more consistent mil thickness. In challenging areas where an airless sprayer is not practical, DC 315 can be applied by brush or roller (See pg. 4 for a list of recommended sprayers).

DC 315 Viscosity:  DC 315 is a 9,000-10,000 viscosity coating. When you open a container of DC 315 it may appear thick before it is mixed, but once remixed for 5 minutes it will return to 9000-10,000 viscosity.


Check appropriate test report or ESR for required wet film thickness (WFT) and gallon per square coverage.  For example, if the wet film thickness (WFT) required is 18 mils, the coverage will be 89 sq. ft. per gallon.


Measuring Wet Film Thickness (WFT)

Figure 1

Figure 2

How to Use a Wet Film Thickness Gauge: A WFT gauge is designed to give the spray applicator immediate mil measurement of the film build just been sprayed. There are several types of WFT gauges available. The most common is the notch gauge (see figure 1). Other types of gauges available from specialty vendors include the eccentric disk, rolling notch, and the 6 sided.   

Technique: When placing the gauge on a freshly painted area, the gauge must be placed at a 90 degree angle to the substrate and pressed firmly to ensure correct depth. The applicator also needs to be aware of variations in the surface that may influence the reading. For example, if the surface is not perfectly flat, one direction may give a more accurate reading than the other. International Fireproof Technology, Inc. (IFTI) suggests placing metal plates throughout the surface of the foam, or at least one per 100 sq. ft. These plates are available at most hardware stores. IFTI recommends writing the job date and applicator name on the back of each plate. Measuring WFT on the front side of the plate will give the most accurate reading. Collect these plates and keep them on file at the job site. They are a great tool to present your code official or Fire Marshal.

To use the WFT gauge, place the gauge directly on the wet area just sprayed as described above (see figure 2). The notches will indicate the measured film thickness. For example, if the 18 mil notch is wet and the 20 notch is dry, then the wet measured thickness is 18 mils.


Spraying DC 315 for Maximum Yield: If this is the first time using DC 315 we suggest testing a pre-measured area to get a feel for spraying and yield. Example, if the job requires 20 wet mils or 80 sq. ft. per gallon, then a 5 gallon pail would cover 400 sq. ft. Measure out one or two 400 sq. ft. sections using pieces of tape, thumbtacks, or canned spray paint. Use just enough to outline the area you intend to apply DC 315. We suggest spraying inside the outlined area and taking wet film thickness measurements, with a wet film gauge across the area, to get a feel for maximum yield.

International Fireproof Technology Inc.
Intertnational Fireproof Technology Inc.