Find the Perfect Material for Seals & Rubber-Plastic Composites
FKM Material
FKM (Fluorocarbon Rubber), also known as fluoroelastomer, is a high-performance synthetic rubber.
Major FKM Brands and Trade Names including:
Viton™ (Chemours)
The most recognized FKM brand globally.
Subtypes:
Viton A: Standard grade for fuels and oils.
Viton GLT: Enhanced low-temperature flexibility.
Viton Extreme™: Resistant to biofuels and aggressive chemicals.
Tecnoflon® (Solvay Specialty Polymers)
Known for high-purity grades suitable for semiconductor and pharmaceutical industries.
Popular grades: Tecnoflon BR 9151 (biofuel-resistant), Tecnoflon PFR (peroxide-cured).
Dyneon™ (3M)
Offers specialized grades for extreme environments, including Dyneon FE 5830Q (low compression set).
ChinaFLUOR® (Zhonghao Chenguang Research Institute)
Leading Chinese FKM brand with cost-effective solutions for automotive seals.
Dai-El™ (Daikin Industries)
Japanese-made FKM with variants optimized for chemical resistance (e.g., Dai-El G-902).
Technical Properties
Gerneral data sheet
| Characteristic | Unit | Test method | Standard range | Typical value |
| Physical properties | ||||
| Hardness Shore A | Point | ASTM D2240 | 70±5 | 72 |
| Tensile strength | MPa | ASTM D412 | ≥10 | 14 |
| Elongation at break | % | ASTM D412 | ≥150 | 210 |
| Comprehension set 70h at 200℃ | % | ASTM D 395 | ≤25 | 23 |
| Low temperature properties Tg by DSC | ℃ | ASTM D3418 | ≤-15 | -17 |
Temperature Range
-20°C to +200°C(short-term up to 250°C)
Fluorocarbon elastomers (FKM) exhibit reduced low-temperature elasticity compared to silicone rubber or EPDM due to the inherent rigidity of their carbon-fluorine (C-F) bonds. To address this limitation, we offer low-temperature-optimized FKM formulations with enhanced flexibility down to -40°C. But these specialized grades, bring higher cost than standard FKM.
If your concerns about low-temperature performance,please contact with us to discuss your application and material selection.
Chemical Resistance
Chemical Resistance
Resists mineral acids, hydrocarbons, fuels, oils, and aromatic fluids.
Vulnerable to ketones, esters, and amines (e.g., biodiesel additives).
Fuel and Oil Resistance
Minimal swelling in gasoline, diesel, and synthetic lubricants.
Ideal for fuel systems, O-rings, and seals in automotive engines.
Typical Applications
- Automotive – Engine System
- Automotive – Fuel System
- Semi-conductor Industry
- Oil&Gas Industry
Related Guides
FKM vs. Silicone Rubber: When to Use Which?
How to Select low temperature FKM?
FAQ
AFLAS® vs. FKM
AFLAS® (AGC Chemicals) is not an FKM but a TFE/P rubber (tetrafluoroethylene-propylene copolymer), classified under FEPM.
Key differences:
Superior alkali and steam resistance compared to FKM.
Lower fuel resistance but better electrical insulation properties.
Common applications: Geothermal seals, alkaline chemical processing.
What certifications do your materials comply with?
Our rubber compounds meet:
Specialized certifications: FDA-compliance for food-grade applications, USP Class VI for medical devices, and REACH/RoHS for environmental safety.
Custom certifications (e.g., UL, NSF) are available upon request.
Do you offer small-batch production?
Yes, we quote according to your requested quantity. Less qty, higher cost.
Can you develop custom rubber formulations?
Yes! We specialize in tailored solutions for unique requirements:
Adjust hardness (Shore A 30–90), conductive, or flame resistance.
Optimize for extreme conditions (e.g., aerospace cryogenic seals, semiconductor acid baths).
Provide prototypes within 2–4 weeks.
Can you develop custom rubber formulations?
Yes! We specialize in tailored solutions for unique requirements:
Adjust hardness (Shore A 30–90), conductive, or flame resistance.
Optimize for extreme conditions (e.g., aerospace cryogenic seals, semiconductor acid baths).
Provide prototypes within 2–4 weeks.
Do you offer technical support?
Yes, we offer technical support from material selection to mechinical design and validation if needed.