How to Fix a Cracked Refractory Panel

Refractory panels are used inside oil furnaces, fireplaces and kilns. The are designed to contain the high temperatures of combustion inside the unit and create a safe living environment. These panels are made from a variety of materials including silica, fire clay, alumina, ceramics and metal oxides. Thy expand and contract as they are heated and cooled which can lead to the panels cracking. Small hairline cracks are normal and should not be repaired.

Things You'll Need

• Nylon brush
• Vacuum
• High heat refractory cement
• Small trowel

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Instructions

1. • 1

     Allow the refractory to cool for 24 hours to assure there is no residual heat in the device.

   • 2

     Insert the nylon brush into the crack and work it back and forth to loosen any material.

   • 3

     Vacuum the crack to remove the dust from the surface.

   • 4

     Apply high heat refractory cement to the end of a trowel and push it into the crack. Once the crack is full, trowel it smooth to match the surface of the panel.

   • 5

     Wait 24 hours for the cement to dry before using the device.