Maximum Reliability in the Harshest Conditions.
Kalrez High-Performance Sealing Solutions are designed to perform in the most aggressive chemical and thermal environments. Manufactured by DuPont, Kalrez products are made from advanced perfluoroelastomer (FFKM) compounds that offer unmatched resistance to high temperatures, harsh solvents, and reactive chemicals. Kalrez seals are trusted where reliability is critical, from high-purity processes to equipment requiring maximum uptime.
With Niantic as your partner, you gain access to genuine Kalrez materials, along with experienced application support to help you match the right compound to your sealing challenge.
High-Performance Sealing for Harsh Industrial Environments.
Extreme Chemical Resistance
FFKM compounds engineered to withstand strong acids, bases, solvents, and aggressive industrial fluids.
High-Temperature Stability
Reliable sealing performance through continuous heat, thermal cycling, and elevated operating conditions.
Extended Service Life
Long-lasting durability that reduces maintenance frequency and supports higher equipment uptime.
Low-Swelling Performance
Excellent dimensional stability in challenging media to maintain consistent, leak-tight sealing.
Kalrez® Resources
Access Kalrez® technical data sheets, material specs, and chemical compatibility guides to help you choose the right high-performance seal for your application.
Featured Content
Kalrez® 9600 For High Temperature Semiconductor Applications
DuPont™ Kalrez® 9600 Chamber Seals in High Temperature PECVD Process
What Makes Kalrez® Different?
Kalrez® Rapid Gas Decompression Testing
DuPont™ Kalrez® 7375 for Gas Turbine Applications
Kalrez 6380 - O-Rings for amine units in oil refineries and gas plants
Kalrez® 0090 for Ball Valves in Refineries
Kalrez® 7275 O-rings for Mechanical Seals in Silicon Chemicals
DuPont™ Kalrez® 9600 Chamber Seals in High Temperature PECVD Process
DuPont™ Kalrez® 7375 for Mechanical Seals in a Chemical Reactor
DuPont™ Kalrez® Spectrum™ 0040 O-Rings for mechanical seals in oil refineries
Kalrez 0090 – O-Rings in Boiler Feed Pumps for Power Stations
Kalrez Spectrum 7075 O-Rings in Heavy Duty Clamping Systems
Kalrez® 7375 Perfluoroelastomer Parts for Gas Turbine Applications
Kalrez® 7275 O-rings for Pumps in Paper Mill Industry
Kalrez® 7090 O-rings for Glass Tube Manufacturing
Kalrez® in Energy - Product Selector Guide
Kalrez® Perfluoroelastomers Solutions Brochure
Kalrez® Perfluoroelastomer Parts Selection Guide
DuPont™ Kalrez® Radiation Resistance Guidelines
DuPont™ Kalrez® Perfluoroelastomer Parts in Chemical Process Industry
Kalrez® 9600 For High Temperature Semiconductor Applications
DuPont™ Kalrez® Compliance for Healthcare, Food and Beverage Industry Applications
Kalrez® 8475 For Semiconductor Oxidation and Diffusion Applications
Technical Report on Kalrez® in RGD Tests in Hydrogen
Kalrez® Life Sciences Product Selector Guide
Kalrez® Perfluoroelastomer Parts
Kalrez® physical properties and product comparison
Select the Kalrez Compound Your Process Actually Needs
Choosing Kalrez® is not just about selecting a premium FFKM compound. It is about ensuring your seal will survive the exact chemical, thermal, and mechanical conditions inside your process. Niantic helps you make that decision with clarity. We review your media exposure, operating temperatures, duty cycle, and equipment tolerances to identify the Kalrez compound that aligns with your real-world environment, not just a catalog description.
Whether you are trying to prevent chemical swelling, reduce thermal degradation, extend time between maintenance cycles, or eliminate repeat failures, Niantic provides hands-on guidance grounded in accepted sealing best practices and extensive application insight. From prototype validation to ongoing supply, our support helps you get the full performance and longevity Kalrez was engineered to deliver.
We help you choose with confidence, avoid unnecessary downtime, and get more value from every Kalrez® seal you put into service.
Q&A:
Answers to Your Kalrez® Sealing Questions
When should I choose Kalrez instead of a standard elastomer?
Kalrez is typically chosen when an application involves aggressive chemicals, high temperatures, or long service intervals where conventional elastomers fail. FFKM compounds resist swelling, hardening, and softening in environments that degrade materials like FKM or EPDM. If you need a seal that remains stable across wide chemical and thermal ranges, Kalrez is often the right choice. Niantic can help you compare your operating conditions with Kalrez performance data to confirm whether FFKM is warranted.
How do I know which Kalrez compound fits my chemical environment?
Kalrez grades vary in resistance to acids, amines, solvents, oxidizers, and mixed chemicals. Choosing the right compound starts with understanding the exact chemicals and concentrations present in your process. FFKM performance can differ significantly between materials such as 4079, 6375, 7075, or 0090. Niantic can review your chemical list and operating temperatures to identify which compound offers the best long-term compatibility.
What temperature range can Kalrez seals withstand?
Most Kalrez® compounds operate reliably up to 327°C (620°F), making them ideal for high-heat environments where standard O-rings and gaskets fail.
Why are my seals degrading even though Kalrez is chemically resistant?
Chemical resistance does not eliminate all failure risks. Surface conditions, gland design, mechanical loads, improper installation, or rapid temperature changes can still cause wear, extrusion, or compression set. Evaluating hardware conditions and compression targets is as important as material selection. Niantic can help identify whether degradation is caused by chemistry, mechanical factors, or gland geometry issues unrelated to the compound.
Can Kalrez improve equipment uptime in rotating or high-pressure systems?
Kalrez’s low swelling and high thermal stability help maintain consistent sealing force, which can support uptime in pumps, valves, compressors, and chemical process equipment. However, success also depends on proper gland design and installation practices. Niantic can evaluate your hardware and pressure conditions to determine whether Kalrez alone is sufficient or whether adjustments are needed for optimal performance.
How do I avoid over-specifying Kalrez when a lower-cost elastomer might work?
Over-specification can increase costs without improving performance. The best approach is to match material properties to actual operating conditions rather than assumed worst-case scenarios. Niantic can compare your process conditions against various elastomer options and help determine whether Kalrez is essential or if another elastomer provides adequate performance at a lower cost.
Have questions about Kalrez® materials or application support?
Niantic is a trusted supplier of Kalrez FFKM sealing solutions. We help customers extend seal life, reduce maintenance, and achieve peak performance in aggressive chemical and high-temperature applications.