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Since 1946

The High-Temperature & Insulating Material Experts

From raw materials to custom-fabricated parts, Red Seal helps manufacturers solve demanding refractory, thermal, electrical, and mechanical insulation challenges.

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The Red Seal Story

We're not just a supplier;
we're your trusted partner in insulating material fabrication.

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98% On Time Delivery

•

Comprehensive Inventory

•

Unmatched Expertise

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98% On Time Delivery • Comprehensive Inventory • Unmatched Expertise •

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Person using a coordinate measuring machine on a pink prototype part in the red seal workshop.
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Person operating a CNC machine in the red seal electric company workshop.
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From material to finished part.

Whether you need the right raw material or a custom-fabricated component, Red Seal has the inventory and expertise to help.

Materials

More than 70 types of insulating materials stocked and ready to ship.

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Fabrication

Custom-machined components built to your specifications.

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Looking for a specific material?

We stock more than 70 types of composite insulating materials that include various types of fiberglass, laminate, cement board, plastic, and mica. Our materials are typically available in sheet, rod, and tube forms. Search by keyword, browse our catalog, or reference our temperature ratings chart.

in-stock & Ready

featured Materials

Materials
Maplex C
Maplex C
$0.00

Maplex C is highly formable, medium-density zero-VOC pressboard with moderate dimensional stability.

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FlexPly® Composite Springs
FlexPly® Composite Springs
$0.00

Our supplier, Composiflex, designs and manufactures a variety of E-glass/epoxy, carbon/epoxy, and high-temperature glass/epoxy FlexPLY® composite springs for numerous industrial equipment applications. These flat springs are most commonly employed within the drive systems of vibratory equipment where they are loaded in bending and excited at their natural frequency.

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Marinite A
Marinite A
$0.00

A strong, machinable, non-asbestos, inorganic board insulation for conveying, containing, handling and forming molten aluminum and other non-ferrous metals. The material is rated for up to 1500º F and has a density of 65 pcf.

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Marinite I & Marinite M
Marinite I & Marinite M
$0.00

A non-asbestos, incombustible material manufactured in panel form. Designed to combine structural strength and high thermal insulating values. The material is rated for up to 1350º F and has a density of 46 pcf.

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Marinite P
Marinite P
$0.00

A non-asbestos, incombustible self-supporting board that provides high insulating values, fire safety and exceptionally high compressive strength. The material is rated for up to 1400º F and has a density of 60 pcf.

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Transite 1000
Transite 1000
$0.00

A high-density, non-asbestos board used in a wide variety of applications where a combination of high strength, thermal stability, electrical insulation or machinability is required. The material is rated for up to 1000º F and has a density of 98 pcf.

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Transite HT
Transite HT
$0.00

A high density, non-asbestos board used in a wide variety of applications where a combination of high strength, thermal stability, electrical insulation or machinability is required. The material is rated for up to 600º F and has a density of 100 pcf.

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OUR PROMISE TO YOU

We Help OUr Customer Stay On Schedule

  • stocking the right inventory

  • turning orders Around quickly

  • Always responsive service

Red Seal has a 98% on-time delivery rate

We know how critical rapid response is to your business and how you depend on getting your parts in a timely fashion.

For most standard parts, we’ll typically get back to you with pricing and delivery quotes the same day.

And – most important – we’re ready to stand behind our commitments. When we say we’ll get it there, we will!

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