We supply custom molded rubber & spring energized PTFE seals in EPDM, Silicone, FKM, FFKM, NBR, PU, BIIR and modified PTFE for railway, medical, new energy and industrial sealing solutions.
Elastomer Materials | Custom Rubber Material Selection Guide
We offer full professional material selection for custom molded elastomer parts.
All materials comply with industrial, railway, medical, and new energy standards.
We provide accurate material recommendation according to working temperature, chemical environment, abrasion requirements, and fire resistance standards.
- EPDM (Ethylene Propylene Diene Monomer)
- Temperature range: ‑40°C ~ +120°C
- Excellent ozone resistance, weather resistance, and aging resistance
- Outstanding waterproof and steam resistance
- Good low‑temperature flexibility
- Fire grade customizable: EN 45545 HL2 / HL3 for railway applications
- Widely used in railway vehicles, outdoor equipment, automotive seals, and mechanical waterproof parts
Best for: Railway sealing systems, outdoor environment, long‑term aging working conditions.
- Silicone / VMQ (Medical & Industrial Grade)
- Temperature range: ‑60°C ~ +200°C
- Food‑grade and medical‑grade available
- High flexibility, non‑toxic, odorless
- Excellent biocompatibility performance
- Customizable: ISO 10993 biocompatibility certification
- Good high‑temperature stability and insulation performance
Best for: Medical devices, healthcare equipment, food machinery, electronic insulation parts.
- FKM / Viton (Fluoroelastomer)
- Temperature range: ‑20°C ~ +250°C
- Superior oil resistance, fuel resistance, chemical corrosion resistance
- High abrasion resistance and extreme aging stability
- Excellent vacuum performance
- Widely used in automotive engine systems, hydraulic systems, chemical equipment
Best for: High temperature, oil environment, chemical industrial equipment.
- FFKM / FFPM (Perfluoroelastomer)
- Temperature range: ‑20°C ~ +300°C
- The highest‑grade elastomer material
- 100% resistance to almost all chemicals, solvents, acids, and alkalis
- Ultra‑high temperature resistance, ultra‑low outgassing
- Long service life in extreme harsh environments
- Suitable for semiconductor, aerospace, pharmaceutical vacuum systems
Best for: Ultra‑high‑end industrial extreme working conditions, semiconductor vacuum equipment, high‑precision chemical systems.
- IIR / Butyl Rubber
- Temperature range: ‑40°C ~ +120°C
- Outstanding gas‑tightness & air‑impermeability
- Good resistance to aging, ozone and weathering
- Low rebound, good damping performance
- Poor oil and solvent resistance
Best for: Inner liners, vibration damping parts, gas‑sealing components, automotive air‑tight seals.
- BIIR Bromobutyl (Brominated Butyl Rubber)
- Temperature range: ‑40°C ~ +120°C
- Retains excellent gas‑tightness of butyl rubber
- Better cross‑linking compatibility, improved adhesion to metal
- Good ozone and aging resistance
- Suitable for rubber‑metal bonding applications
Best for: Composite seals, rubber‑metal bonded components, air‑tight sealing assemblies.
- NBR (Nitrile Butadiene Rubber)
- Temperature range: ‑30°C ~ +120°C
- Excellent oil & fuel resistance
- Good mechanical strength and wear resistance
- Poor weather & ozone resistance, not for outdoor long‑term use
Best for: Hydraulic & oil‑system seals, automotive fuel parts, general industrial oil‑resistant components.
- NR (Natural Rubber)
- Temperature range: ‑50°C ~ +100°C
- Superior elasticity, high tensile strength, good tear resistance
- Excellent low‑temperature performance
- Poor oil, ozone and chemical resistance
Best for: Shock absorption, vibration dampers, soft‑touch seals, dynamic rubber parts.
- CR (Chloroprene Rubber / Neoprene)
- Temperature range: ‑30°C ~ +120°C
- Balanced performance: good weather resistance, moderate oil resistance
- Good flame‑retardant property, high physical strength
- Good adhesion to metal substrates
Best for: General‑purpose industrial seals, weather‑resistant gaskets, rubber‑metal bonded parts.
- PU (Polyurethane Elastomer)
- Temperature range: ‑40°C ~ +120°C
- Exceptional high abrasion resistance, high tensile & tear strength
- Good oil resistance; limited resistance to hydrolysis & high‑humidity environment
Best for: Heavy‑load wear‑resistant parts, rollers, high‑stress sealing components.
Custom Hardness & Custom‑Formulated Rubber Compounds
- Spring Energized PTFE / Modified PTFE Seals
(Structured Composite Sealing System)
Our spring energized PTFE seals adopt virgin or filled modified PTFE as the main sealing jacket, combined with internal metal springs or elastic O-rings to provide continuous preload compression.
This advanced structure completely replaces traditional rubber oil seals for extreme working conditions.
- Temperature range: ‑200°C ~ +260°C
- Material options: Pure PTFE, glass-filled PTFE, carbon-filled PTFE, graphite-filled modified PTFE
- Zero creep improvement by modified filling formula
- Ultra-low friction, self-lubricating, non-stick
- Fully resistant to strong acid, alkali, solvent, and corrosive media
- Spring/O-ring automatic wear compensation, zero leakage under dynamic operation
Best for: Valves, compressors, cryogenic equipment, chemical pipelines, aerospace, semiconductor and high-precision hydraulic systems.
Custom Hardness & Custom‑Formulated Rubber Compounds
We support customized hardness from 30 Shore A ~ 90 Shore A
Custom compound formula available for:
- Low friction
- Anti-aging enhancement
- High fire resistance
- Low outgassing
- Medical biocompatibility
- Railway standard compliance
Material Technical Support
If you have special working conditions or unclear material requirements,
please send your drawings, working temperature, medium, and usage environment.
We provide free professional material evaluation and solution recommendation.