The Invisible Hero of Fire Safety: B1 Fire-Resistant Polyurethane Foams

When it comes to fire safety in a building, the first things that come to mind are sprinkler systems or fire extinguishers. However, true protection lies in passive fire-stopping solutions. The critical gap filler that prevents fire from spreading from one room to another, stops smoke leakage, and buys you life-saving seconds: B1 Fire-Resistant Polyurethane Foam.

What Does B1 Classification Mean?

Polyurethane foams are classified according to their fire behavior under the DIN 4102 standard. So why B1?

• B1 (Flame-Retardant): The safest class—self-extinguishing when the fire source is removed and does not allow flames to spread.
• B2 (Normally Flammable): Continues to burn but at a slower rate.
• B3 (Highly Flammable): Lower fire resistance compared to B1 and B2.

Why Should You Use Akfix 820P B1?

While ordinary foam can act as fuel during a fire and accelerate flame spread, Akfix 820P B1 acts as a fire barrier. Here are the three key reasons that make it indispensable:

1. Smoke and Toxic Gas Barrier

In most fire-related fatalities, the cause is not flames but smoke inhalation. Akfix 820P seals applied gaps completely, preventing toxic gases from leaking into corridors and evacuation routes.

2. Fire Resistance Up to 217 Minutes

Tested and certified under laboratory conditions, this foam can block fire penetration for up to 217 minutes under specific application conditions. This time is critical for emergency response and safe evacuation.

3. Preservation of Structural Integrity

Cable penetrations and pipe lines act as “highways” for fire spread. When insulated with B1 foam, these pathways are sealed, helping maintain the building’s structural stability and reducing the risk of collapse.



Professional Applications of Fire-Resistant Foams

Fire-resistant foams play a critical role not only in construction but also in high-tech environments:

• Electrical Panels and Cable Trays: Prevent the spread of fires caused by short circuits.
• Data Centers: A passive safety layer protecting high-value data infrastructure.
• Fire Door Installation: The quality of the gap between the frame and the wall is just as important as the door itself.
• Ventilation Ducts: Prevent fire from spreading throughout the building via air circulation systems.

A Technical Perspective: The Power of Standards

It’s not enough for a product to claim it is “fire-resistant”—it must prove it. Akfix 820P B1 has been tested and certified in accordance with European standards.

Important Note: Fire safety is only as strong as its weakest link. Using low-quality materials can render your entire fire protection system ineffective.

Don’t Leave Safety to Chance
In a fire, every second means a life and every second means an investment. Akfix 820P B1 Fire-Resistant Polyurethane Foam is not just a filler—it is a safety shield that extends the lifespan of structures.

Choose the safest solution for your Project