Simriz® Perfluoroelastomer (FFKM) Compounds
The O-Ring Store LLC is a Preferred Distributor of genuine Freudenberg Simriz® O-Rings.
Browse All Simriz® FFKM O-Rings
Simriz® compounds represent the highest level of perfluoroelastomer (FFKM) technology, delivering unmatched performance in the most demanding sealing environments. These proprietary materials combine near-universal chemical resistance (similar to PTFE) with true elastomeric properties, enabling reliable sealing where other materials fail.
Why Choose Simriz® Perfluoroelastomers?
Simriz® offers distinct advantages for extreme applications:
Nearly universal chemical resistance — including acids, bases, amines, solvents, steam, hot water, and aggressive oxidizers.
Exceptional thermal stability — with grades capable of continuous service up to 325°C (617°F).
Superior compression set resistance — for longer seal life and reduced maintenance, especially at extreme temperatures.
Patented cross-linking technology — providing an optimal balance of chemical and thermal performance that frequently outperforms competitive FFKM materials.
Vertical integration — Freudenberg is the only FFKM supplier fully integrated back to the monomers, ensuring consistent quality, supply reliability, and cost-effective pricing.
Optimized compound portfolio — each grade engineered for specific challenges, delivering reliable, high-value solutions.
Simriz® compounds often provide superior long-term reliability in simultaneous high-temperature and harsh-chemical exposure, better rapid gas decompression resistance in select grades, and overall premier sealing performance backed by decades of expertise.
Simriz® Compound Selection Guide
| Compound | Color | Hardness (Shore A) | Temperature Range (°C) | Key Features & Approvals | Primary Applications | Available Products |
|---|---|---|---|---|---|---|
| Simriz® 134 | Black | 90 | -15 to +230 | Outstanding RGD resistance (NORSOK M-710 approved); broad chemical compatibility; steam/hot water stable. | Oil & gas, high-pressure gas, power generation. | Shop Simriz® 134 O-Rings |
| Simriz® 481 | Black | 70 | -30 to +230 | Excellent low-temperature flexibility; broad chemical resistance. | Chemical processing with low temperatures, oil & gas. | Shop Simriz® 481 O-Rings |
| Simriz® 484 | Black | 75 | -20 to +230 | FDA compliant; USP Class VI; 3-A sanitary standards; broad chemical/thermal resistance. | Food & beverage, pharmaceutical, life sciences. | Shop Simriz® 484 O-Rings |
| Simriz® 485 | Black | 75 | -7 to +230 | General-purpose; excellent broad chemical resistance; steam/hot water compatible; outstanding value. | Chemical processing, power generation, general extreme service. | Shop Simriz® 485 O-Rings |
| Simriz® 486 | White | 75 | -7 to +230 | High-purity white compound; FDA compliant; broad chemical resistance and cleanliness. | Pharmaceutical, semiconductor, cleanroom applications. | Shop Simriz® 486 O-Rings |
| Simriz® 495 | Black | 75 | -7 to +230 | Superior performance in strong acids, oxidizers, steam, and hot water. | Chemical processing, oil & gas, aggressive media. | Shop Simriz® 495 O-Rings |
| Simriz® 498 | Black | 80 | -6 to +325 | Ultimate high-temperature capability; patented structure; superior compression set at extreme temperatures; broad chemical resistance. | Aerospace, power generation, high-temperature chemical processing. | Shop Simriz® 498 O-Rings |
| Simriz® 501 | Black | 77 | -6 to +325 | Next-generation aerospace material; exceeds AMS 7257 requirements; superior lifetime and reliability. | Aerospace engines and systems. | Contact sales@theoringstore.com for availability |
| Simriz® Z7257 | Black | 79 | -2 to +320 | Proven aerospace compound; AMS 7257 compliant; excellent high-temperature performance. | Aerospace engines and high-temperature applications. | Contact sales@theoringstore.com for availability |
Cross-Reference Guide for Popular FFKM Compounds
Simriz® perfluoroelastomers are premium alternatives to many widely used FFKM compounds. The table below provides recommended Simriz® equivalents based on performance characteristics, applications, and industry data.
*SZ498 covers almost every FFKM O-ring application! Exceptions are -NORSOK grade, -FDA compliant, -AMS7257
| Trade Name | Compound | Nominal Durometer | Simriz® Recommendation | Market | Comments |
|---|---|---|---|---|---|
| Chemraz® | 505 | 75 | SZ495 or SZ498* | CPI | Broad chemical resistance, CPI |
| Chemraz® | 510 | 90 | SZ134 or SZ498* | CPI, Oil and Gas | CPI, Oil and Gas, general purpose |
| Chemraz® | 514 | 70 | SZ486 | CPI | CPI, non-black, general purpose |
| Chemraz® | 522 | 95 | SZ134 | CPI, Oil and Gas | CPI, Oil and Gas, general purpose |
| Chemraz® | 526 | 95 | SZ134 | CPI, Oil and Gas | CPI, Oil and Gas, general purpose |
| Chemraz® | 550 | 75 | SZ485 | CPI | Broad chemical resistance, high temp. resistance to 300C |
| Chemraz® | 551 | 75 | SZ498 | CPI | Broad chemical resistance, high temp. resistance to 300C |
| Chemraz® | 555 | 80 | SZ498 | CPI | CPI, high temp. with broad chemical resistance |
| Chemraz® | 562 | 80 | SZ485 or SZ498* | CPI, Oil and Gas | CPI, Oil and Gas, general purpose |
| Chemraz® | 584 | 70 | SZ486 | CPI | CPI, non-black, general purpose |
| Chemraz® | 585 | 80 | SZ486 | CPI | CPI, non-black, general purpose |
| Chemraz® | 600 | 90 | SZ134 | CPI, Oil and Gas | CPI, Oil and Gas |
| Chemraz® | 605 | 80 | SZ495 or SZ498* | CPI | Broad chemical resistance, CPI |
| Chemraz® | 615 | 75 | SZ501, SZ498 for non-AS application | CPI, Aerospace | Aerospace, AMS7257, temp. to 325C |
| Chemraz® | 618 | 75 | Z7257, SZ501 | Aerospace | Aerospace, AMS7257, temp. to 315C |
| Chemraz® | 625 | 80 | SZ484 | CPI | FDA and USP Class VI |
| Chemraz® | 653 | 80 | SZ498 | CPI | Broad chemical resistance, high temp. resistance to 300C |
| Fannteer | FF7506 | 78 | SZ485 | ||
| Fluorochem | FC7525 | SZ501 | (MFPseals part) | ||
| Isolast® | J8325 | 75 | Z7257, SZ501 (SZ498 for non-AS) | CPI, Aerospace | Isolast® J8325 is NOT QPL'd to AMS7257; Isolast® J8325 shows splitting in compression at high temp. |
| Isolast® | J9501 | 80 | SZ486 | CPI, strong oxidizers | Rocket fuels such as fuming red nitric acid |
| Isolast® | J9503 | 75 | SZ485 | CPI | |
| Isolast® | J9505 | 70 | SZ486 | CPI, Semicon | |
| Isolast® | J9509 | 90 | SZ134 | CPI, Oil and Gas | CPI, Oil and Gas |
| Isolast® | J9510 | 95 | SZ134 | CPI, Oil and Gas | CPI, Oil and Gas; Rapid gas decompression resistant |
| Isolast® | J9512 | 75 | SZ495 | CPI | Broad chemical resistance, CPI, strong acid resistance |
| Isolast® | J9513 | 90 | SZ134 | CPI, Oil and Gas | CPI, Oil and Gas; Rapid gas decompression resistant |
| Isolast® | J9515 plus | 75 | SZ484 | CPI, food and beverage | FDA compliant |
| Isolast® | J9516 plus | 75 | SZ486 | CPI, food and beverage | FDA compliant |
| Kalrez® | 1058 | 70 | SZ481 | CPI | Black, general purpose, lower durometer |
| Kalrez® | 3018 | 90 | SZ134 | CPI, Oil and Gas | CPI, Oil and Gas, general purpose |
| Kalrez® | 4079 | 75 | Z7257, SZ501 (SZ498 for non-AS) | CPI, Aerospace | Aerospace, AMS7257, temp. to 315C |
| Kalrez® | 6221 | 70-75 | SZ481 / SZ486 | CPI | General purpose variations |
| Kalrez® | 6230 | 75 | SZ485 or SZ498* | CPI | CPI, Oil and Gas, general purpose |
| Kalrez® | 6375 | 75 | SZ495 or SZ498* | CPI | Very broad chemical resistance |
| Kalrez® | 7075 | 75 | SZ498 | CPI, Aerospace | Aerospace, AMS7257, temp. to 325C |
| Kalrez® | 7090 | 90 | SZ134 | CPI, Oil and Gas | CPI, Oil, RGD and Gas, general purpose |
| Kalrez® | 0090 | 90 | SZ134 | CPI, Oil and Gas | Rapid Gas Decompression resistant |
| Kalrez® | 1050LF | 80 | SZ485 or SZ498* | CPI, Oil and Gas | CPI, Oil and Gas, general purpose |
| Markez® | Z1026 | 75 | SZ485 | CPI | Paint spray equipment |
| Markez® | Z1028 | 75 | SZ485 | CPI | CPI, Oil and Gas, general purpose |
| Markez® | Z1029 | 75 | SZ486 | CPI | CPI, Oil and Gas, general purpose |
| Markez® | Z1204 | 75 | SZ484 | CPI | CPI, FDA compliant; USP Class VI tested |
| Markez® | Z1206 | 75 | SZ486 | Semicon | General purpose |
| Markez® | Z1210 | 80 | SZ495 | CPI | CPI, Oil and Gas, general purpose; steam |
| Markez® | Z1216 | 75 | No white high. Temp Simriz available. Use SZ498 black if possible | Semicon | High temp. and high purity |
| Markez® | Z1305 | 80 | SZ486 | CPI | CPI, FDA compliant; USP Class VI tested |
| Markez® | Z1307 | 75 | Semicon | High purity | |
| Markez® | Z1317 | 90 | SZ134 | CPI | CPI, Oil and Gas, general purpose |
| Markez® | Z1319 | 75 | Z7257, SZ501 (SZ498 for 80duro) | CPI | CPI, Oil and Gas, high temp.; steam |
| Markez® | Z1321 | 75 | SZ481 | CPI | CPI, Oil and Gas, general purpose; low temp. |
| Markez® | Z1322 | 90 | No low Temp, high Duro Simriz available. Use SZ134 if temp. range is sufficient | CPI | CPI, Oil and Gas, general purpose; NORSOK M710 RGD resistant; low temp. |
| Markez® | Z1352 | 75 | SZ485 | CPI | CPI, Oil and Gas, general purpose; amines |
| Markez® | Z1401 | 80 | SZ498 | CPI | CPI, Oil and Gas, high temp. |
| Markez® | Z1403 | 75 | No white high. Temp Simriz available. Use SZ498 black if possible | Semicon | High temp. and high purity |
| Markez® | Z1404 | 75 | SZ495 | CPI | CPI, Oil and Gas, general purpose; steam |
| Markez® | Z1409 | 75 | SZ484 | CPI | CPI, FDA compliant |
| Markez® | Z1411 | 62 | Semicon | High purity | |
| Markez® | Z1412 | 90 | SZ134 | CPI | CPI, Oil and Gas, general purpose; NORSOK M710 RGD resistant |
| Parofluor® | V8545-75 | 75 | Z7257, SZ501 (SZ498 for non-AS) | Aerospace | Aerospace, AMS7257, temp. to 315C |
| Parofluor® | V8562-75 | 75 | SZ486 | CPI | CPI, FDA compliant |
| Parofluor® | V8588-90 | 90 | SZ134 | CPI, Oil and Gas | CPI, Oil and Gas, general purpose |
| Parofluor® Ultra | FF102-75 | 75 | SZ495 or SZ498* | CPI | CPI, good acid resistance |
| Parofluor® Ultra | FF200-75 | 75 | SZ498 | Aerospace | Aerospace, AMS7257, temp. to 325C |
| Parofluor® Ultra | FF202-90 | 90 | SZ134 or SZ498* | CPI, Oil and Gas | CPI, Oil and Gas |
| Parofluor® Ultra | FF352-75 | 75 | SZ486 | CPI | white, general purpose |
| Parofluor® Ultra | FF500-75 | 75 | SZ484 | CPI | CPI, FDA compliant |
| Parofluor® Ultra | FF650-75 | 75 | SZ495 or SZ484 if FDA is needed | CPI | FDA and USP Class VI |
| Perlast® | G70A | 70 | SZ481 | CPI | CPI, general purpose |
| Perlast® | G74S | 72 | SZ486 | CPI, F&B, Pharmaceutical | FDA and USP Class VI |
| Perlast® | G75B | 79 | SZ498 | CPI | Broad Chemical & High Temperatures |
| Perlast® | G75H | 75 | SZ508 | CPI, Semicon | Ultimate Semi-Con App |
| Perlast® | G75M | 75 | SZ485 | CPI | Low compression Set |
| Perlast® | G75S | 80 | SZ486 | CPI, F&B, Pharmaceutical | FDA and USP Class VI |
| Perlast® | G80A | 81 | SZ485 | CPI | Broad Chemical Resistance |
| Perlast® | G90A | 86 | SZ134 | CPI | Broad Chemical Resistance |
* Indicates SZ498 recommended for higher temperature requirements.
This cross-reference is intended as a guide to assist in material selection. Performance can vary based on specific conditions. For critical applications, please contact sales@theoringstore.com for expert assistance.