High Temperature O-Rings & Seals

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Rocket Seals distributes high temperature products including O-rings and seals. Choosing the correct high temperature O-ring or high temperature seal is critical to prevent seal failure in high temperature applications.

Rocket Seals will work with you to weigh the pros and cons of each of our high temperature O-rings or seals to determine which is the correct material for your application.

Benefits and Characteristics of High Temperature O-rings & Seals

High temperature O-rings and high temperature seals are typically able to withstand temperatures ranging from 250°F to 450°F. Rocket Seals distributes O-rings and seals in a variety of materials that can be used in high temperature applications. These include: Viton™, Silicone, HNBR, PTFE, Kalrez®, Chemraz®, or other FFKM compounds.


Viton™ seals and O-rings retain their flexibility, shape and seal when exposed to chemicals and high temperatures which make them great components to use in harsh environments. Viton™ is a fluoropolymer elastomer and synthetic rubber compound trademarked by DuPont.


Silicone includes a large group of materials in which vinyl-methyl-silicone (VMQ) is often the central ingredient. Silicones are excellent seal materials for extreme temperature in static applications. Silicone is also specified for applications involving ozone and UV radiation. Most silicone is red or orange.


Hydrogenated Nitrile (HNBR) is a synthetic polymer that is obtained by saturating the double bonds of nitrile’s butadiene segments with hydrogen. It is known for its physical strength and resistance to heat, oil and chemicals.


PTFE is also known as Teflon®. Discovered din 1938, Teflon® is a hard plastic that must be laid in place because it is not stretchable. PTFE maintains strength and toughness at low temperatures down to -250° F and is good up to 450° F.


Kalrez® is a DuPont trademark. It is resistant to over 1,800 different harsh chemicals while offering the high temperature stability of Teflon®. Temperature range for these compounds is usually -4°F to 615°F.


Chemraz® is the Green Tweed version of Kalrez®. It is also a member of the perfluoroelastomer polymer family Simriz®. Chemraz® has a high heat, chemical and solvent resistance. Its defining properties are exceptional resistance to steam and performance in low-temperature environments, as well as availability.

High Temperature O-rings & Seals Specs

High temperature O-rings and seals are manufactured in standard, inch or metric sizes. These O-rings and seals are used in a variety of applications.

Sealing applications

  • Machine design
  • Chemical processing
  • Oil and gas
  • Aerospace
  • Alternative fuels
  • Life sciences

O-ring Specs & Certifications

  • AS568 (2-XXX, 3-XXX, 5XXX Sizes)
  • FDA and USP Class VI
  • Mil, AMS and NAS Spec
  • NSF 51, NSF 61 and UL Listed

Customers can special order high temperature O-rings and seals in different colors for parts identification to avoid assembly or repair mistakes. Contact Rocket Seals today to learn how we can partner with you to find the correct high temperature O-ring or high temperature seal for your application.


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