Boilers & Furnaces
Products: refractory castables, plastic masses, firebricks, refractory cements & adhesives, insulating lightweight bricks.
For boilers, heating systems, and industrial furnaces, durability and insulation matter most.
This collection offers heavy-duty refractory castables, reliable bricks, and lightweight insulating materials that reduce heat loss and increase efficiency.
Our products are engineered to withstand high temperatures and tough operating conditions, helping extend the lifetime of your equipment.
12 products
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RTH-USA RB-40 Fireclay Refractory Bricks (box of 3)
RB-40 Firebricks - Box of 6
RTH-USA UNIREF-40 Ready-to-Use Refractory Mortar 44 lb
RTH-USA UNIREF-40 Ready-to-Use Refractory Mortar - 10 fl.oz.
RTH-USA RCAST-52 Medium Cement Refractory Concrete 33 lb
RTH-USA ILTEX-0.4 Ultralight Fire Insulation Bricks (pack of 2)
RTH-USA UNIREF-40 Ready-to-Use Refractory Mortar 74 fl.oz.
RTH-USA RCAST-62SP Low Cement Refractory Concrete 33 lb
RTH-USA RCAST-45G Medium Cement Refractory Gunning Concrete 33 lb
RTH-USA RCAST-45 Medium Cement Refractory Concrete 33 lb
ILTEX-0.4 Insulating Bricks - Pack of 6
RTH-USA PROTEPLAST-60 Plastic Refractory Mass 11 lb (74 fl. oz.)
Your Warmth, Our Care
Everything your fireplace needs – in one place. Whether you are building a brand-new fireplace, upgrading an existing one, or repairing what time and heat have worn down, we provide the right solutions to make the job easier and the results more reliable. From ready-to-use mortars like UNIREF-40, to high-performance fireclay mortars such as MORTACLAY-40d, and durable firebricks like RB-40, you’ll find professional-grade products designed to withstand extreme temperatures and deliver long-lasting performance. But our selection doesn’t end there – we offer a wide range of refractory materials, repair solutions, and accessories to fit projects of every size.
RB-40 Firebricks - Box of 6
RTH-USA RB-40 Fireclay Refractory Bricks (box of 3)
RCC-3 Clay Powder 30 lb
Built for Performance
Designed for Simplicity
With our products you can be confident that your fireplace or stove won’t just look good, but will also remain safe, efficient, and strong for years to come. Easy to use, engineered for durability, and available in practical package sizes, our lineup makes fireplace construction and repair straightforward – whether you are a professional builder or a homeowner tackling a personal project.
Because when it comes to warmth, comfort, and peace of mind, every detail matters – and we’ve got you covered.
