General Notes:
| Filling Core Type | Key Features | Typical Usage |
|---|---|---|
| Honeycomb Paper | Lightweight, cost-effective, basic insulation | Standard fire doors, interior use |
| Mineral Wool (Rock Wool) | Excellent fire resistance, good insulation | High fire rating, commercial/industrial |
| Magnesium Oxide (MgO) Board | Non-combustible, high strength, moisture-proof | Premium fire doors, external use |
| Ceramic Fiber | Superior fire resistance, lightweight | High-end, specialized fire doors |
| Perlite Board | Fireproof, moisture-resistant | Medium-grade fire doors |
Note:
Selection depends on required fire rating (such as 30/60/90 minutes), application scenario, and compliance with certification standards (UL, CE).
If you need to optimize your product title or keywords for a steel fire door with a specific filling core, let me know your focus (e.g., fire rating, insulation type) for targeted suggestions.
As a fire door supplier with more than 20 years experience, we provide the steel fire doors with main 3 types Filling core.
Honeycomb
Honeycomb is a polymer/compound formed into continuous uniform hexagonal cells. This material can resist high pressure.It is the best choice with its Light weight, high strength, smooth surface, non-toxic environmental protection.It will be a very good choice if you need it flat and with light weight.
Perlite
Perlite is a lightweight granular material that's white in colour. It looks and feels like little bits of polystyrene but is actually made from expanded volcanic glass, heated to 1000°C until it 'pops' (like popcorn) to many times its original size. It's lightweight, sterile, and easy to handle, and is long-lasting.when it is used in doors, it will help to be fire-resistant and also keep hot energy inside the room.
Not Only for Steel fire door, Perlite is also the main material we use for producing UL fire rated wood Door.
Aluminum Silicate Wool
It will be the best one in these 3 types, it is Low thermal conductivity and good insulation performance. When used under the same conditions, aluminum silicate products have a thermal conductivity lower than other insulation materials by more than 30%. Lightweight and stable, with characteristics such as softness, lightness, and elasticity.If you have enough budget and require higher standard, it will be a good choice for fire doors you need.
All the above filling core can be chosen for our UL Listed steel fire door,we are keeping to offer you our best price and service.
