Complete Guide to BNZ Marinite Replacement Materials
For many years, Marinite® by BNZ Materials has been a trusted high-temperature insulation board for industrial applications requiring excellent thermal performance, dimensional stability, and machinability. Common applications include:
Furnace and kiln linings
Foundry core pallets
Backup insulation for steel ladles
Heat treating equipment
Industrial ovens
Thermal processing equipment
Following the permanent closure of a BNZ Materials' manufacturing facility, production of Marinite® products has ended. We recognize that many manufacturers and fabricators rely on these materials, and this change means many organizations are now evaluating suitable replacement products for future projects.
As a long-standing distributor of high-temperature insulation materials, Red Seal Electric Company is helping customers transition to proven alternatives from leading manufacturers, including Promat and Johns Manville. Our team can recommend replacement materials based on your specific application, operating temperature, machining requirements, and performance needs.
Limited Marinite® Inventory Still Available
Red Seal currently (as of July 1, 2026) has limited remaining inventory of select Marinite® grades, including:
Inventory levels are changing rapidly, and availability cannot be guaranteed. If your operation depends on Marinite®, we encourage you to contact us as soon as possible to check current stock and discuss a long-term replacement strategy.
Marinite® Replacement Materials by Grade
| Marinite Grade | Alternative Product(s) | Technical Data Sheet |
|---|---|---|
| Marinite® A | Promat MONALITE® M1AT | View MONALITE® M1AT Data Sheet |
| Marinite® C | Promat MONALITE® M1T | View MONALITE® M1T Data Sheet |
| Marinite® I | Super Firetemp® X or Promat PROMATECT®-MST | View Super Firetemp® X Data Sheet View PROMATECT®-MST Data Sheet |
| Marinite® P | Super Firetemp® S or Promat MONOLUX® | View Super Firetemp® S Data Sheet View MONOLUX® Data Sheet |
Frequently Asked Questions about marinite replacement materials
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Inventory is limited and demand has increased following the end of production. Because availability changes daily, we recommend contacting us as soon as possible if you need Marinite® for an upcoming project.
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Once existing inventory has been sold, no additional Marinite® will be manufactured. Customers will need to transition to an alternative material such as Promat or Super Firetemp® products that provide similar thermal performance.
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Every application has different requirements, including operating temperature, mechanical strength, machining needs, and thermal conductivity. Our material specialists can help you identify the best replacement based on your specific application.
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Not always. Many replacement materials have similar characteristics, but some applications may require minor adjustments for thickness, machining tolerances, or fastening methods. We'll help evaluate your application and recommend the best fit.
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Yes. In addition to material distribution, Red Seal specializes in precision fabrication of high-temperature non-metallic materials. We can supply finished parts, machined components, or raw sheets based on your project requirements.
Need Help Finding a Marinite® Replacement?
Whether you're looking for remaining Marinite® inventory or evaluating replacement materials, our team is here to help.
Contact Red Seal Electric Company today to discuss your application, request a quote, or speak with one of our high-temperature material specialists.
With over 70 types of composite insulating materials in stock— including fiberglass, mica, calcium silicate boards, and more— we’re ready to help you find the best-fit solution. Reach out to our team to request samples, specs, or a quote for your next project.