Fire Resistant Intumescent Coating FAQ: Steel Protection, Use and Ordering

DN-DK FireShield is a thick inorganic, non-intumescent fire-resistant coating for steel structures. It uses inorganic binders with vermiculite and perlite thermal aggregates to form a rigid, low-thermal-conductivity barrier. Unlike an intumescent coating, it is described as not foaming in fire.

No. The product is non-intumescent. Therefore, the search phrase “fire resistant intumescent coating” should not be treated as the product classification.

The product is described as complying with GB 14907-2018 Type H and delivering up to 3 hours of fire resistance. The published description gives a thermal conductivity of no more than 0.10 W/m·K and associates the 3-hour performance with a 25–35 mm film thickness. Actual project acceptance should be checked against the applicable design and approval requirements.

Applications include heavy load-bearing steel components and steelwork in outdoor, underground and highly corrosive industrial environments. Examples include petrochemical plants, offshore platforms, tunnels, exterior stadium steel frames, high-rise columns, bridge supports and factory trusses. The product can cover exposed outdoor steel and hidden ceiling-wrapped structural frames.

The published material positions DN-DK FireShield for outdoor, underground and highly corrosive industrial scenarios. It describes resistance to water, acid, alkali, thermal cycling, humidity, temperature swings and chemical splashes. Project teams should still verify substrate, exposure and system compatibility for the specific site rather than assuming that every environment is covered without review.

The product is described as asbestos-free and non-toxic. Its listed composition includes inorganic binders, vermiculite and perlite thermal aggregates. These statements describe the published product formulation and should be checked against the documentation and requirements applicable to the purchasing country and project.

The published information states that spray application can reach up to 10 mm per single layer, with a 6–8 hour interval between coats. It also associates a 25–35 mm film thickness with up to 3 hours of fire resistance. These are product-level published figures, not a substitute for the project-specific application system or inspection requirements.

Before requesting a quotation or placing an order, confirm at least the following:

• The required technology: non-intumescent or intumescent.
• The steel member types and whether they are exposed, outdoor, underground or enclosed.
• The required fire-resistance duration and applicable standard or approval route.
• The target coating thickness and layer-build schedule.
• Site exposure, including corrosion, moisture, chemicals and temperature cycling.
• Substrate and system compatibility, together with the technical documents needed for project review.

See Non-Intumescent Fire Resistant Coating for Steel Structures.

It is a non-intumescent coating for heavy steel structures, including outdoor, underground and industrial scenarios.