300 x 300 x 50mm J25 insulation fire brick

300 x 300 x 50mm J25 Insulation Brick – Pizza Oven & Kiln Insulation

Upgrade your build with the J25 Insulation Brick (300mm x 300mm x 50mm) – a professional-grade refractory solution designed to handle extreme heat while keeping energy costs down. Perfect for pizza ovens, wood-fired ovens, kilns, and furnaces, this insulation brick combines strength, efficiency, and ease of use.

• Premium Thermal Insulation – Minimizes heat loss, holds consistent temperatures, and improves fuel efficiency.

• Lightweight & Easy to Install – Strong yet manageable, making it simple to cut, shape, and place during oven or kiln builds.

• Durable Refractory Material – Withstands continuous high-temperature exposure without breaking down.

• Versatile Applications – Commonly used under oven floors, as sidewall insulation, or as a heat barrier in kilns and furnaces.

• Size – 300mm x 300mm x 50mm (J25 grade).

Trusted by oven builders and installers, this brick provides the reliable insulation needed for long-lasting wood-fired pizza ovens, ceramic kilns, and commercial high-heat systems.