International Fireproof Technology, Inc.

Proper surface preparation plays a major role in intumescent coating performance. Dust, debris, oil and moisture can all impact adhesion, curing and long-term durability if surfaces are not properly prepared before application.

Skipping prep can lead to poor adhesion, uneven curing, blistering and premature coating failure, creating costly rework and potential compliance issues later on.

Choosing between an alternative ignition barrier and an alternative thermal barrier?

Both are designed to improve fire protection over spray foam insulation, but they serve different purposes.

An ignition barrier helps reduce the chance of spray foam igniting in limited-access spaces like attics and crawlspaces, whereas a thermal barrier provides a higher level of protection by slowing heat transfer and fire growth in occupied spaces.

DC315 is tested and approved for both alternative ignition barrier and alternative thermal barrier applications over spray foam insulation.

How far does a gallon of DC315 go?

DC315 provides up to 115 sq. ft. of coverage per gallon at 14 wet mils for alternative thermal barrier rating, and 400 sq ft per gallon at 4 mils wet film for alternative ignition barreir rating, helping contractors cover more area while still meeting the required application thickness for compliant fire protection.

That matters on site. More efficient coverage can help reduce product use, labour time and overall application costs without compromising the tested system. Be sure to check the coverage and application rate needed for the foam you're working with. You can confirm the exact requirements on our ICC-ES-3702 evaluation report.

Environmental conditions can impact coating performance faster than many contractors realize.

From overheated substrates to changing humidity levels, environmental conditions play a major role in proper curing and long-term performance. Monitoring conditions throughout the job helps avoid costly issues later.

Follow these tips to get the best results:
• Monitor environmental conditions & substrate temperatures
• Avoid direct afternoon sunlight
• Stay within approved temperature ranges
• Maintain airflow during curing
• Monitor humidity throughout application

DC315 typically dries to the touch in 1–2 hours under normal conditions (around 77°F / 25°C and 50% relative humidity or less). If you’re applying a second coat, plan to wait 2–4 hours before recoating.

Keep in mind that drying times can vary depending on temperature, humidity and ventilation, so always monitor each application to ensure proper performance. Cure time can range from 24-72 hours depending upon environmental conditions.

Spray foam insulation installed? Make sure it’s properly protected.

DC315 is a tested and evaluated intumescent coating approved as an alternative thermal and ignition barrier in qualifying assemblies. It helps slow flame spread and meet code requirements when applied correctly.

Spray foam performs. DC315 protects.

With 25 years in the industry, Houston Bros Spray Foam Insulation continues to deliver high-performance spray foam and coating applications across both large-scale commercial builds and everyday projects. From substrate prep to final coating, every step is handled with consistency and control to meet code and perform long term.

This metal warehouse in Christiansburg, VA required 28 sets of Dynamo 2lb closed-cell spray foam and 360 gallons of DC315 coating, supplied by Dynamo Polyurethane Systems.

A strong example of what it takes to execute at scale without compromising quality.

Not all coatings are created for the same job.

DC315 and DC360 are both intumescent, meaning they expand when exposed to heat, but they serve very different purposes.

DC315 is designed for spray foam as a thermal barrier, helping meet code requirements, while DC360 is used as a fire-retardant coating on substrates like wood and gypsum to reduce flame spread.

Understanding the difference is key to choosing the right system and staying compliant on every project.

INSS1440 Fire Barrier Caulk is a single-component, water-based intumescent sealant designed to seal gaps around penetrations, joints, doors and window frames in fire-rated assemblies. Its fast expansion technology fills voids quickly, helping protect against fire, heat transfer, smoke and gases while using less material than traditional firestop caulks.

With strong adhesion to most construction materials, easy installation and long-term tested performance, it’s a reliable solution for achieving code-compliant fire protection across a wide range of applications.