Seals with High-Temperature Resistance

The two key purposes of high-temperature seals are to ensure that the structure can endure high temperatures and any pressure without breaking, and to provide a secure barrier to prevent the entry or exit of any gases, liquids, or other matter in the sealed structure.

Image Credit: Mid-Mountain Materials, Inc.

An effective high-temperature seal will guarantee that the structure has a longer lifetime with less unplanned downtime, which will eventually save both time and money for the company.

These seals are employed in a wide range of industries, such as automotive, hearth, aerospace, and oil and gas. An extensive selection of high-temperature seals for these industries is supplied by Mid-Mountain Materials, Inc.


The THERMOPAK® range by Mid-Mountain is intended for use as thermal insulation barriers in high-temperature applications. They also hold applications in areas where there is a danger of abrasion or chemical attack.

Tadpole Gaskets

THERMOPAK® Tadpole Gaskets are particularly developed for applications that may have oddly shaped components and need a high-temperature seal with maximum flexibility. These gaskets are made from a range of cover and core materials, including fiberglass textiles, stainless steel mesh, coated fabrics, and refractory ceramic fiber textiles.

Tadpole Gaskets can be used as seals in furnace and oven doors, non-ferrous metals operations, for fume and emissions control, and gas fireplaces.

Die Cut Gaskets

Mid-Mountain’s THERMOPAK® Die-Cut Gaskets range is customized according to client’s specifications, and they are used for filling any flaws on surfaces that may need a high-temperature seal. They are fabricated from materials that offer the highest level of heat, abrasion, and chemical resistance. This makes them a popular choice in several industries.

Mid-Mountain is able to produce these die cut gaskets with a range of insulation materials, such as ceramic fiber paper, refractory-coated fabric, silicone-coated fabrics, and fiberglass paper.


The THERMOSEAL® product range is designed for use as high-temperature seals in high-temperature adhesive and thermal insulation applications. Each product is manufactured to prevent thermal contraction and expansions, making sure the seals remain secure.

Refractory Cements, Moldables and Coatings

Bulk refractory fibers are used to develop THERMOSEAL® Refractory Cements, Moldables, and Coatings. Based on the application, these THERMOSEAL® products can be pushed into cracks or holes, or formed into shapes and linings to provide a seal and protect against erosion.

These products are characterized by excellent insulation properties, extremely low shrinkage, and high strength. They are usually used in various applications such as coatings for furnace linings, burners, molds, and troughs, lightweight refractory coatings, molten aluminum splash protection, and induction furnace coil coating.


Mid-Mountain’s ARMATEX® Coated Fabrics family is ideal for use as high-temperature seals as it provides superior heat protection. These fabrics also exhibit excellent durability when exposed to abrasion and chemicals.

Refractory Coated Fabrics and Textiles

Refractory coated textiles and fabrics are very effective as high-temperature seals, thanks to the use of Q-Mix, Mid-Mountain’s proprietary refractory coating. Q-Mix can be applied to various substrates, and it is used to increase the substrate’s abrasion, chemical, and temperature resistance.

This range also includes textiles and fabrics coated with various polymer coatings that offer exceptional thermal insulation properties, enabling them to be used in fabricated components for specialty seals.

These high-temperature seals have applications in the insulation and aluminum, automotive, and aerospace industries.

High-Temperature Seals from Mid Mountain

Mid-Mountain has a large range of products designed for use as high-temperature seals. The company also offers custom solutions where necessary. For more information about high-temperature seals, customers can contact Mid-Mountain.

Mid-Mountain Materials, Inc

This information has been sourced, reviewed and adapted from materials provided by Mid-Mountain Materials, Inc.

For more information on this source, please visit Mid-Mountain Materials, Inc.


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