Choosing a reliable fireproof board is essential for safe, heat-resistant installations around fireplaces, wood stoves, pizza ovens, and kilns. This guide highlights five top ceramic fiber insulation boards rated up to 2300F, offering durable thermal protection with minimal smoke and odor. Each option is evaluated by temperature tolerance, density, and practical use cases to help you compare performance and select the right board for walls, baffles, and firebox components.
| Product | Brand | Key Quality |
|---|---|---|
| SIMOND STORE Ceramic Fiber Insulation Board – 2300F 0.47″ | SIMOND STORE | High temp (2300F), compact size |
| SIMOND STORE Ceramic Fiber Insulation Board – 2300F 1″ x 18″ x 24″ | SIMOND STORE | Versatile dimensions, strong insulation |
| Lynn Manufacturing 1/2” Thick 12″ x 16″ (2-Pack) 2300F | Lynn Manufacturing | Two-pack, smoke-free when fired |
| SIMOND STORE Ceramic Fiber Board Insulation – 2300F 1″ x 19.7″ x 39.4″ | SIMOND STORE | Large panel, long insulating run |
| GIRtech Ceramic Fiber Insulation Board 23.6″ x 12″ x 0.5″ | GIRtech | Slim profile, lightweight |
SIMOND STORE 0.47″ Ceramic Fiber Board (2300F)
This aluminosilicate refractory ceramic fiber board measures 0.47″ thick with dimensions 12″ x 24″. It is rated up to 2300F and has a density of 20–24 lb/ft³. It offers a compressive strength of 78 PSI at 25% deformation and shows a maximum permanent linear shrinkage of 3.5% at 2200F after 24 hours. LOI at 1832F is 4–7%, indicating limited volatile content during high-heat exposure. Suitable for baffles, fireplace linings, and heating chambers where compact panels are required.
SIMOND STORE 2300F 1″ x 18″ x 24″
This 1″ thick aluminosilicate board measures 18″ by 24″ and shares the same 2300F rating as other SIMOND boards. It maintains a density of 20–24 lb/ft³, with 78 PSI compressive strength at 25% deformation and 3.5% maximum shrinkage after prolonged exposure to heat. LOI ranges 4–7% at 1832F. It suits furnace walls, wood stoves, and larger fireplace components requiring a robust panel with extended surface area.
Lynn Manufacturing 1/2” Thick 12″ x 16″ (2-Pack)
Two-pack 1/2″ thick boards sized 12″ x 16″ deliver 2300F short-term and 2100F continuous-use ratings. The product notes a smoke-free start and LOI of 0.0%. Materials are suitable for wood stoves baffles, gas fireplaces, pizza ovens, and kilns. The boards have a density of 20–24 lb/ft³, making them rigid yet lightweight for retrofit installations and shield components requiring compact, low-profile panels.
SIMOND STORE 1″ x 19.7″ x 39.4″ Insulation Board
This large-format 1″ board measures 19.7″ by 39.4″ and is rated to 2300F. Density remains at 20–24 lb/ft³ with 78 PSI compressive strength and 3.5% shrinkage at 2200F after 24 hours. LOI at 1832F is 4–7%. Ideal for long runs along walls, large hearth liners, or expansive firebox interiors where continuous insulation is preferred.
SIMOND STORE 1″ x 15″ x 24″ (Pack of 2)
Pack of two 1″ boards measuring 15″ by 24″ each. All features align with the 2300F rating, density 20–24 lb/ft³, and a 78 PSI compressive strength at 25% deformation. With 3.5% maximum shrinkage at 2200F after 24 hours and LOI 4–7% at 1832F, these boards suit larger scale fireplace barriers, chamber linings, and high-heat shields requiring multiple panels.
Ceramic Fiber Insulation Board 23.6″ x 12″ x 0.5″ (GIRtech)
GIRtech’s slim 0.5″ board measures 23.6″ by 12″ and is designed for high-temperature panels where minimal thickness matters. While it shares the 2300F rating with other boards, its lighter profile makes it suitable for narrow walls, fireplace setbacks, heat shields, and wraparound insulation. It emphasizes durable construction and thermal resilience without adding bulk to the installation.
Buying Guide
- Temperature rating: Most boards here max out at 2300F. Confirm your appliance’s peak exposure to ensure the board maintains integrity over time.
- Board density and strength: Density ranges 20–24 lb/ft³ with around 78 PSI compressive strength. Higher density improves durability in load-bearing or high-heat zones.
- Dimensions and flexibility: Panels come in varied thicknesses and sizes. Choose thickness based on clearance, stove design, and required insulation area.
- Shrinkage and LOI: Expect up to 3.5% shrinkage and LOI of 4–7% at high temperatures. These metrics affect long-term fit and off-gassing behavior.
- Smoke and odor: Some boards advertise smoke-free operation upon initial firing, which is advantageous for indoor installations.
- Application fit: Large panels suit long walls and chimneys; slimmer boards fit tight spaces, baffles, or custom firebox linings. Pack options can reduce seams in multi-panel builds.
- Installation considerations: Proper bonding, edge finishing, and support framing are important to prevent cracking under thermal cycling.
- Safety and compliance: Ensure boards are rated for residential use and compatible with your fireplace or stove’s venting and clearance requirements.