Search  for anything...

USL Insulating Fire Bricks 2500F Pack of 6 Firebricks for Internal Lining Heating Units Insulating Warming Layer for Fireplace, Steel Furnace, Wood Stove, Ceramic Oven Kiln, Blacksmith Forge

  • Based on 190 reviews
Condition: New
Checking for the best price...
$39.99 Why this price?
Save $3.00 was $42.99

Buy Now, Pay Later


As low as $9 / mo
  • – 4-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Wednesday, Sep 2
Order within 5 minutes
Available payment plans shown during checkout

Protection Plan Protect Your Purchase
Checking for protection plans...

Size: Pack of 6


Features

  • Versatile Performance: Our GIRtech USL Firebricks are specially designed for lining heating units with a maximum operating temperature of up to 2500 F and service temperature 2370 F. They can be used as an insulating or warming layer, making them suitable for various applications.
  • Wide Range of Uses: Whether you have a brick fireplace, steel furnace, heating stove, barbecue, ceramics kiln, or blacksmith forge, our firebricks are ideal for lining and insulation. They offer excellent heat retention and durability for long-lasting performance.
  • Premium Quality Materials: We prioritize your safety and the environment. Our firebricks are made of Fireclay and Chamotte - eco-friendly natural components, ensuring they are non-toxic and safe for human health.
  • Recommended Mortar: To ensure optimal results, use our GIRtech Ready Mix or GIRtech Dry Mix fireclay/alumina mortar for refractory masonry. Prior to installation, moisten the contact surface with water. Avoid using cement mixes as a masonry mortar.
  • Easy Customization: Our firebricks can be cut or processed with a special tool to meet your specific requirements. Enjoy the flexibility of shaping them to fit your heating unit perfectly.
  • Convenient Packaging: Each set of GIRtech USL Firebricks comes in a branded cardboard box, containing 6 pieces. The packaging ensures secure transportation and easy storage.
  • Safety First: Rest assured that our firebricks are non-toxic and safe for human health, allowing you to enjoy your heating units worry-free.
  • Dimensions: 1.25"D x 9"W x 4.5"H

Description

GIRtech USL – is a special intermediate duty thin firebrick which are used for lining heating units with a maximum operating temperature of up to 2500 ° F, as an insulating or warming layer. Firebrick can be used in any type of domestic heating units, such as brick fireplaces, steel furnaces, heating stoves, barbecues and barbecue complexes, ceramics kilns and blacksmith forge. It can be used lining and insulation of furnaces. It is made from eco-friendly natural components and safe for human health This product is not intended for use in industrial units where contact between the refractory lining and molten metals is possible. Refractory masonry must be done on a fireclay/alumina mortar, for example GIRtech Ready Mix or GIRtech Dry Mix. Before performing work, it is necessary to moisten the contact surface with some water. It is not recommended to use cement mixes as a masonry mortar. GIRtech USL could be cuted or processed with a special tool if necessary Firebricks are packed in branded cardboard boxes of 6 pieces

Brand: GIRtech


Material: Alloy Steel, Metal


Item Weight: 5.49 Kilograms


Unit Count: 6.0 Count


Brand Name: GIRtech


Unit Count: 6.0 Count


Manufacturer: ABC Manufactured Goods Inc


Item Type Name: Intermediate Thin Fire Brick


Material Type: Alloy Steel, Metal


Item Weight: 5.49 Kilograms


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Sep 2

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Hold your heat
Size: Pack of 6
These bricks work really great I put them inside my firebox of my smoker. Helps keep heat in and use less fire wood.
Reviewed in the United States on November 4, 2025 by RH in TEXAS

  • Worth the buy
Size: Pack of 6
Use them for the inside of my offset smoker firebox and they work great for helping hold temp
Reviewed in the United States on October 3, 2025 by Morgan s.

  • Fit right in
Size: Pack of 6
Bricks fit right into our wood stove. Seems to be working as hoped they would.
Reviewed in the United States on March 11, 2024 by T Sims

  • Low quality
Size: Pack of 6
These fell apart within a few months.
Reviewed in the United States on December 26, 2025 by Wendy T

  • Phenomenal Packaging
Size: Pack of 6
Given the fragility of this item I expected at least one to arrive broken. I was pleasantly surprised! The packaging was exceptional and none were broken. They are very well made, very solid, not brittle at all and fit into my fireplace perfectly. Kudos to this company for taking such care to ensure a good product with phenomenal packaging. It’s rare that someone cares enough these days. ... show more
Reviewed in the United States on May 18, 2024 by Tammy

  • Niceeeeeeeee
Size: Pack of 6
Put these in my offset smoker by oklahoma joe and the old boy is getting better and better . Recommend anyone that is asking about them to buy them you'll be amazed .
Reviewed in the United States on July 10, 2024 by Frankie Sanders

  • good product
I used bricks for wood stove. What i did not like is Delivery Driver left my package outside of garage door were the dogs could get it it should be on my front porch
Reviewed in the United States on March 3, 2024 by katherine F.

  • one came broke
Size: Pack of 6
the rest seems ok bricks ,
Reviewed in the United States on January 8, 2021 by my real name

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...