Ceramic Fiber Insulation Board 2300F - 1/2 in x 19.7 in x 39.4 in

In this review the Ceramic Fiber Insulation Board proves to be a practical, high temperature solution for home and workshop heating equipment. It is aimed at hobbyists and technicians who need a dense, machinable refractory panel that withstands extreme heat; the single biggest reason to buy is its 2300F maximum temperature rating combined with a 20-24 lb/ft3 density, which delivers insulating performance and a usable, rigid board form. The review focuses on real-world fit, ease of cutting and how it holds up in wood stoves, kilns and pizza ovens.

Key Features

• High temperature resistance: The board withstands temperatures up to 2300F, letting it serve as hot face lining or internal baffle in high heat appliances.
• Dense, rigid construction: At 20-24 lb/ft3 density the vacuum cast aluminosilicate board provides structure and compressive strength for demanding installations.
• Good compressive strength: Measured at 78 PSI at 25% deformation, it resists deformation under load in furnace and stove applications.
• Low shrinkage: Permanent linear shrinkage is limited to about 3.5% after 24 hours at 2200F, helping the board keep dimensions when exposed to prolonged high heat.
• Easy to machine: The material cuts cleanly with a hacksaw blade or knife and can be drilled or shaped to fit custom openings and panels.
• Versatile uses: Suitable for wood stoves, fireplaces, kilns, forges, pizza ovens and as backup insulation behind refractory brick or castable linings.

Who It's For

This board is best for DIYers, kiln and oven builders, and anyone maintaining or upgrading stoves and furnaces who needs a solid, machinable high temperature panel. It works well as an internal baffle, hot-face lining or heat shield where rigid support and thermal resistance are required.

It is less appropriate for applications that demand flexible blanket-style insulation or for users who need ultra-thin or soft conformable materials; those users should seek ceramic fiber blankets or different insulation types tailored to thin or curved surfaces.

Pros & Cons

Pros

• High rated temperature (2300F) makes it suitable for many high-heat appliances and kilns.
• Dense, vacuum cast construction offers usable compressive strength and dimensional stability.
• Easy to cut and drill, allowing straightforward installation and custom fitting.
• Versatile across stoves, fireplaces, pizza ovens and furnace applications.

Cons

• Material can be brittle, so care is needed when handling and fitting to avoid chipping.
• Not flexible, so it cannot conform to curved surfaces without cutting into segments.

Specifications

Material	Aluminosilicate ceramic fiber
Dimensions	1/2 in x 19.7 in x 39.4 in
Maximum temperature	2300F
Density	20-24 lb/ft3
Compressive strength	78 PSI at 25% deformation
Permanent linear shrinkage	Max 3.5% at 2200F (24 hrs)
Loss on ignition (LOI)	4-7% at 1832F

Our Verdict

The Ceramic Fiber Insulation Board is a solid value for those needing a rigid, high temperature insulation panel that is easy to cut and fit. It balances density and machinability, making it a practical choice for stove baffles, kiln linings and pizza oven rebuilds; just handle carefully to avoid brittleness and plan for cutting when fitting curved or tight spots.

Frequently Asked Questions

Can the board be cut with common tools?
Yes, it cuts cleanly with a hacksaw blade or knife and can be drilled or machined for custom fits.

Is this suitable for stove or furnace hot face lining?
Yes, its 2300F rating and vacuum cast density make it suitable as a hot face lining or internal baffle in many wood stoves and furnaces.

Will it shrink under prolonged heat?
Some shrinkage occurs; permanent linear shrinkage is about 3.5% max after 24 hours at 2200F, so allow clearance in tight installations.