High-Temperature Firebricks. Our firebrick line of products provide high temperature service up to 2,700 degrees F. They are suitable for backup insulation, or hot-face duty. Typical applications include pizza ovens, boilers, kilns and furnaces. Check each individual product to select the right one for your application. Prices include shipping within the contiguous US. Call for pricing on larger quantities. (716) 442-3004.