Zhengzhou Zhongkeda Refractory Materials Co., Ltd

Insulating Fire Clay Brick（IFB） Manufacturer | Lightweight Fire Bricks Direct from Factory
Insulating fire bricks for pizza ovens, fireplaces, kilns and furnaces.Standard sizes and custom sizes are available.
• Lightweight：Easy to handle

• Excellent Insulation：Helps reduce heat loss

• Factory Direct:Made and supplied by us
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Keep the Heat Where You Need It.

IFB is a lightweight refractory brick designed to provide excellent thermal insulation at high temperatures.

It helps ovens and furnaces retain heat while reducing heat loss.

Item	NG-1.5	NG-1.3	NG-1.2	NG-1.0	NG-0.8	NG-0.6	NG-0.5
Bulk Density (g/cm³)≤	1.5	1.3	1.2	1.0	0.8	0.6	0.5
Cold Crushing Strength (MPa)≥	6	5	4.5	3.5	2.5	1.3	1.0
Permanent Linear Change on Heating/（%）	1400℃*12h	1350℃*12h		1300℃*12h	1250℃*12h	1200℃*12h	1150℃*12h
	-2~1
Thermal conductivity W/(m•K)Mean temperature (350±25)℃ ≤	0.65	0.55	0.50	0.40	0.35	0.25	0.23

Why Choose Insulating Fire Clay Brick?
More insulation. Less heat loss. Easier installation

🔥 Keep Heat Inside:Reduce heat loss and help your oven or furnace maintain temperature.

⚡ Improve Energy Efficiency:Good thermal insulation means less heat is wasted.

🧱 Lightweight:Easier to carry, cut and install than dense refractory bricks.

🌡️ High Temperature Resistant:Suitable for high-temperature ovens, kilns and furnaces.

One Brick,Many Uses
From home ovens to industrial furnaces, IFB helps keep the heat where it belongs.

Made by Us. Supplied Directly to You.

We manufacture insulating fire bricks in our own factory.

From raw materials and forming to firing, inspection and packing, we control the production process ourselves.

Your Size? We Can Make It

Need a different size or shape?

Send us your drawing, sample or dimensions. We can check the requirements and manufacture accordingly.

Standard Size	Custom Size	Custom Shape
230 × 114 × 65 mm	Made according to your dimensions	Special shapes available

<a href="https://www.zkdrefractories.com/e_contact/">Send Your Size →</a>

Choose the Right IFB for Your Application

Different applications require different levels of insulation and strength. Choose the grade according to your application.

Grade	Recommended For
NG-0.5	Maximum thermal insulation
NG-0.6	Pizza ovens, kilns & general insulation
NG-0.8	Ovens, kilns & furnaces
NG-1.0	General furnace applications
NG-1.2	Applications requiring higher strength
NG-1.3	Higher-temperature applications
NG-1.5	Applications requiring higher mechanical strength

Not sure which grade is right for you?

Tell us your application, working temperature and required size. We'll recommend the right IFB for your project.

<a href="https://www.zkdrefractories.com/e_contact/">[Ask Us →]</a>

Tell Us What You Need

Size + Quantity + Application

Send us your requirements.

We will recommend the suitable IFB grade and provide a quotation.

 

<a href="https://www.zkdrefractories.com/e_contact/">Get a Quote</a>

FAQ

1. What are insulating fire bricks used for?

Insulating fire bricks are commonly used in pizza ovens, fireplaces, wood-fired ovens, masonry heaters, ceramic kilns, pottery kilns and small furnaces. They can also be used as insulation or backup lining in industrial furnaces.
2. What is the difference between IFB and dense fire bricks?

IFB are lightweight and have lower thermal conductivity, making them suitable for insulation and reducing heat loss. Dense fire bricks are heavier and generally provide higher mechanical strength and resistance to wear.

3. What temperature can your insulating fire bricks withstand?

Our IFB grades are available for different temperature requirements, with service temperatures generally ranging from 1260°C to 1400°C, depending on the grade.

4. Which IFB grade should I choose?

It depends on your application, working temperature and required insulation performance. If you are not sure which grade to choose, send us your application and working temperature, and we can recommend a suitable grade.

5. Do you offer custom sizes and shapes?

Yes. We can produce insulating fire bricks according to your required dimensions, drawings or samples.

6. Do you have a minimum order quantity (MOQ)?

We can supply both small and large quantities. For larger quantities, we can usually offer more competitive pricing.

7. Can you supply samples?

Yes. Samples can be arranged for customers who need to test the bricks before placing an order.

8. How are the bricks packed for export?

The bricks are normally packed on pallets and protected for export transportation. Packaging can also be discussed according to your shipping requirements.

9. Are you a manufacturer or a trading company?

We are a refractory brick manufacturer in China. Insulating fire bricks are produced in our own factory, and we supply standard and customized products directly to customers.

10. How can I get a quotation?

Send us your required size, quantity, application and working temperature if available. We will recommend the suitable grade and provide a quotation.