Ultimate Chemical Resistance FFKM O-Rings
When standard elastomers fail, FFKM delivers. Engineered for the most demanding chemical processing, pharmaceutical, and semiconductor applications where failure is not an option.
FFKM vs Standard Elastomers
Kalrez® Equivalents Guide & FFKM Cross-Reference
Complete DuPont Kalrez cross-reference with third-party FFKM equivalents. Compare Kalrez grades with Chemraz, Perlast, and other FFKM compounds for optimal material selection.
Complete Kalrez Grade Cross-Reference Matrix
DuPont Kalrez equivalents with Chemraz, Perlast, and generic FFKM compounds
| Kalrez Grade | Chemraz Equivalent | Perlast Equivalent | Generic FFKM | Key Applications |
|---|---|---|---|---|
| Kalrez 4079 | Chemraz 505 | Perlast G75LF | FFKM-75 | General chemical processing, acids, bases |
| Kalrez 6375 | Chemraz 6366 | Perlast G95LF | FFKM-95 | Semiconductor plasma, extreme chemicals |
| Kalrez 7075 | Chemraz 6230 | Perlast G85LT | FFKM-85 | Low temperature, amine resistance |
| Kalrez 8575 | Chemraz 8575 | Perlast G80HT | FFKM-80 | High temperature, aerospace applications |
| Kalrez 0040 | Chemraz 0040 | Perlast G90BF | FFKM-90 | Ultra-low extractables, pharmaceutical |
Kalrez Equivalency Guidelines
While Chemraz, Perlast, and generic FFKM compounds offer similar performance to Kalrez grades, always verify chemical compatibility and operating conditions for your specific application. DuPont Kalrez formulations may have unique properties not replicated in equivalent compounds.
FFKM Grade Selection Matrix
Choose the optimal FFKM compound for your specific application requirements. Each grade offers unique advantages for different operating conditions.
Kalrez® 4079
General Purpose FFKM
Best For:
- • General chemical processing
- • Broad chemical compatibility
- • Cost-effective FFKM solution
- • Aggressive acids and bases
Kalrez® 6375
Plasma Resistant
Best For:
- • Semiconductor plasma chambers
- • Atomic layer deposition
- • CVD equipment sealing
- • Aggressive plasma environments
Chemraz® 505
Low Temperature FFKM
Best For:
- • Low temperature applications
- • Cryogenic chemical exposure
- • Dynamic sealing applications
- • Enhanced flexibility needed
FFKM Chemical Resistance Database
Comprehensive chemical compatibility data for over 1900 chemicals. Our engineering team maintains the industry's most complete FFKM resistance database.
Strong Acids
Concentrated acids that attack standard elastomers
Strong Bases
Caustic solutions & amines
Solvents
Aggressive organic solvents
Oxidizers
Strong oxidizing agents
FFKM Total Cost of Ownership Calculator
Calculate the true value of FFKM seals including extended service life and reduced maintenance costs.
Application Parameters
5-Year TCO Analysis
Material Costs
Maintenance Costs
Downtime Costs
Critical Industry Applications
FFKM seals are essential in industries where chemical compatibility and reliability are non-negotiable.
Semiconductor
Plasma & Etch Chambers
FFKM seals withstand aggressive plasma environments and etching gases that destroy standard elastomers in semiconductor manufacturing.
Key Requirements:
- • Plasma resistance (CF₄, CHF₃, NF₃)
- • Ultra-high purity (10 ppb extractables)
- • Thermal cycling stability
- • Low particle generation
Pharmaceutical
API Processing
FDA-compliant FFKM seals for pharmaceutical processing where product purity and regulatory compliance are critical.
Key Requirements:
- • FDA 21 CFR 177.2600 compliance
- • USP Class VI certification
- • SIP/CIP sterilization resistance
- • Low extractables & leachables
Chemical Processing
Extreme Conditions
Ultimate chemical resistance for the most aggressive processing environments where equipment reliability is paramount.
Key Requirements:
- • Concentrated acid resistance
- • High temperature stability
- • Explosive decompression resistance
- • Long-term aging resistance
FFKM Technical Specifications
Comprehensive technical data for FFKM materials to support your design and application engineering.
| Property | Test Method | Kalrez 4079 | Kalrez 6375 | Chemraz 505 |
|---|---|---|---|---|
| Hardness (Shore A) | ASTM D2240 | 75 ± 5 | 75 ± 5 | 70 ± 5 |
| Tensile Strength (psi) | ASTM D412 | 1,450 | 1,600 | 1,200 |
| Elongation (%) | ASTM D412 | 200 | 180 | 250 |
| Compression Set (%) | ASTM D395B | 15 | 20 | 18 |
| Temperature Range | Continuous Service | -15°F to 600°F | -15°F to 600°F | -40°F to 500°F |
| Specific Gravity | ASTM D792 | 2.05 | 2.10 | 2.00 |
Standard Size Availability
Express Service: Critical sizes available with 48-hour emergency service for semiconductor and pharmaceutical applications.
Quality Certifications
Get Your FFKM Technical Quote
Our FFKM specialists will help you select the optimal compound and provide detailed technical and commercial proposals within 24 hours.
24-Hour Response
Technical specifications and commercial quote delivered within one business day.
Free Samples
Evaluation samples for qualified applications. Test before you commit.
Engineering Support
Our FFKM specialists provide application engineering and design recommendations.
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