*These refractory liner tiles are compatible with Cleaver-Brooks boilers.
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Powermaster Rear Refractory
Premium Powermaster rear refractories shield vulnerable back walls from extreme, high-velocity combustion gases and wear.
We have a full inventory of OEM-compatible Powermaster Rear Refractory Tiles at all sizes and horsepower requirements.
Part # | Diameter | Model | HP Range
In-stock items. Order by 2:00 PM EST for Same-Day Shipping.
*Halmar Corporation offers many Cleaver-Brooks aftermarket parts. Halmar Corporation is not a factory authorized sales representative for Cleaver-Brooks, nor is Halmar Corporation affiliated with Cleaver-Brooks in any way. Cleaver-Brooks is a registered trademark of Cleaver-Brooks, Inc., Thomasville, GA.
Some aftermarket parts may be made by other manufacturers.
Need Help Identifying the Right Tile?
Mismatched refractory dimensions can disrupt burner air profiles and create dangerous external hot spots. Our team can review your equipment prints and cross-reference dimensions to ensure a precise fit.

Frequently Asked Questions About Powermaster Rear Refractory
Tiles
What is a Powermaster rear refractory component and what is its primary function?
A Powermaster rear refractory component is a heavy-duty, premium insulation liner engineered specifically to fit the rear reversing chamber or rear door of Powermaster industrial boilers. Its primary function is to seal the high-temperature turnaround zone where hot flue gases change direction to enter subsequent tube passes. By delivering excellent radiant heat protection, these specialized boiler refractory tiles maximize thermal efficiency, shield the rear steel outer casing from blistering, and protect critical system boundaries.
What are the main signs that a Powermaster rear refractory lining needs to be replaced?
Because the backend reversing chamber handles the combined thermal energy of the primary firing pass, it experiences aggressive heat stress and thermal cycling. During routine turnarounds or scheduled fireside maintenance cleanouts, technicians should look for severe surface spalling, deep interlocking fractures, or structural sagging along the door brick. If segments begin to loosen or crumble, extreme heat will bypass the insulation liner and warp the backend steel framework, meaning immediate installation of premium replacement boiler refractory tiles is required.
Why source aftermarket Powermaster rear refractory from Halmar instead of an OEM?
Ordering original back-end components directly from factory equipment manufacturers often subjects engineering teams to long supplier wait times and heavy price inflation. Halmar operates as an independent domestic manufacturer, handling the complete high-temperature casting and curing process internally inside our modern Louisville, Kentucky facility. We maintain an extensive inventory of premium aftermarket boiler parts on our shelves, allowing us to supply outstanding material density, precise dimensional alignment, and fast same-day shipping to minimize your asset downtime.
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