Durlon® HT1000® – The Ultimate High-Temperature Gasket Solution

Realistic Durlon® HT1000® phlogopite mica gasket with metallic green-gold finish resting upright on a brushed steel surface. Blurred background of a high-temperature industrial facility with glowing thermal lighting.

Posted on March 31, 2026 by Bill Campbell, Northeast Regional Sales Manager

When it comes to sealing solutions in demanding environments, the right gasket material can make all the difference. That’s where Durlon® HT1000® steps in as a top choice, designed for extreme temperature applications in industries like power generation, chemical processing, and refining. Let’s explore what makes Durlon® HT1000® stand out.

What is Durlon® HT1000®?

Durlon® HT1000® is a high-performance gasket material made from phlogopite mica paper impregnated with an inorganic binder. Phlogopite mica is a naturally occurring, non-toxic silicate of potassium and magnesium. It boasts excellent flexibility, high tensile strength, and resistance to chemical attack. Furthermore, phlogopite mica is fireproof, infusible, incombustible, and a known alternative to asbestos, making it an ideal choice for industries where safety and reliability are paramount.

Key Features of Durlon® HT1000®

  • High-Temperature Resistance: Withstands up to 1,832°F, ensuring reliable performance in extreme heat applications.
  • Low Binder Content: Contains less than half the binder of similar products, providing <4% weight loss at 1,472°F and long-lasting sealing under extreme conditions.
  • Versatile Sheet Forms:
    • S90: Mica paper with inorganic binder, no carrier.
    • L316: Mica paper + 0.002” stainless steel carrier.
    • T316: Mica paper + 0.004” perforated stainless steel carrier.
  • Outstanding Physical Properties: Exceptional compressibility (18–25%), recovery (39–43%), creep strength up to 5,800 psi, and tensile strength up to 2,900 psi for durability and dependability.
  • Broad Industry Applications: Ideal for general industry, marine, mining, OEM, petrochemical, power generation, and refining sectors.

Certifications & Compliance

Certifications table showing API 607 fire test (4th edition with Exxon modifications) and RoHS Reach compliance for Durlon® HT1000® high-temperature gasket material.

Why Choose Durlon® HT1000®?

Durlon® HT1000® excels where other gasket materials fall short. Its ability to handle both high temperatures and pressures makes it an ideal choice for critical applications in heat exchangers, exhaust manifolds, and other equipment found in refineries and power plants. Moreover, its composition ensures minimal environmental impact, making it a sustainable choice for modern industry needs.

Final Thoughts

Selecting the right gasket material is crucial for maintaining safety and efficiency in high-temperature and high-pressure environments. Durlon® HT1000® offers a superior solution, combining exceptional physical properties, high-temperature resistance, and versatile applications. Whether you are in the petrochemical industry, power generation, or any other sector that demands the best in sealing technology, Durlon® HT1000® is the gasket material you can trust.

For more information on Durlon® HT1000® or to discuss how it can fit your specific needs, feel free to contact us or visit Durlon.com.