Analyzing the chemical and physical properties that make DC315 fire barrier effective
Spray polyurethane foam (SPF) is a popular insulation choice for its air-sealing, moisture resistance and energy-saving benefits. However, because of its combustibility, it must be protected with a certified thermal or ignition barrier. That’s where DC315 by International Fireproof Technology Inc. (IFTI) comes in—a scientifically formulated intumescent coating designed to improve fire resistance and meet stringent global standards.
DC315’s effectiveness lies in its multi-component formulation, which includes a source of carbon (for char), an acid catalyst (to initiate swelling) and a gas source (to foam the char). When exposed to temperatures above 175°C, this chemical cocktail produces a thick, stable char layer that shields the combustible foam beneath. This reaction buys critical evacuation and suppression time in real-world fire scenarios.
Testing plays a vital role in validating these properties. DC315 has passed rigorous tests that reflect both North American and European standards, including ASTM E84, NFPA 286, BS 476 Part 21/22 and EN 13501-1. These tests confirm the coating’s ability to reduce flame spread, limit smoke production and maintain integrity across diverse building applications. IFTI’s commitment to continual testing supports ongoing product optimization in response to evolving international codes.
Beyond lab data, real-world use confirms the practicality of DC315. It can be applied in-field with standard airless spray equipment, dries quickly and adheres to open- and closed-cell SPF. Contractors benefit from easy application and consistent film build-up, while building inspectors can rely on comprehensive data packages and visual cues to confirm coverage.
For SPF insulation systems to perform safely under fire exposure, the protective coating must do more than check a regulatory box—it must actively resist combustion. That’s the science-backed promise of DC315: fire protection grounded in chemistry, validated in laboratories and proven on jobsites worldwide.
Explore DC315’s performance data, or learn more about how it can boost your spray foam business.