Albania Algeria Andorra Argentina Australia Austria Bahrain Belarus Belgium Bolivia Bosnia & Herzegovina Brazil Brunei Bulgaria Cameroon Canada Chile China Colombia Costa Rica Croatia Cyprus Czechia Denmark Ecuador Egypt Estonia Finland France Georgia Germany Gibraltar Greece Grenada Hong Kong SAR China Hungary Iceland India Indonesia Ireland Israel Italy Japan Jordan Kazakhstan Latvia Liechtenstein Lithuania Luxembourg Madagascar Malaysia Malta Mexico Moldova Monaco Montenegro Morocco Namibia Netherlands New Zealand Nicaragua Nigeria Norway Oman Pakistan Panama Paraguay Peru Philippines Poland Portugal Puerto Rico Qatar Romania Saudi Arabia Serbia Singapore Slovakia Slovenia South Africa South Korea Spain Sri Lanka Sweden Switzerland Taiwan Thailand Tunisia Türkiye Ukraine United Arab Emirates United Kingdom United States Uruguay Venezuela Vietnam

Brands Unlock Free AI Search

GYLON EPIX® Style 3504

Advanced PTFE Sealing for Modern Hydrogen Applications

With the German Federal Ministry of Education and Research (BMBF) accelerating the national hydrogen strategy as of July 2023, the demand for safe, reliable, and regulation‑compliant sealing materials has significantly increased. GYLON EPIX® Style 3504 addresses these requirements by combining proven PTFE gasketing technology with the enhanced EPIX® surface structure for improved adaptability, compressibility, and sealing reliability.

Hydrogen applications—including green hydrogen from electrolysis and grey hydrogen from fossil sources—require sealing materials capable of withstanding gaseous H₂, cryogenic temperatures, rapid pressure changes, and chemically diverse environments. GYLON EPIX® Style 3504 is engineered to meet these challenges across the hydrogen value chain.

Certified Performance for Hydrogen Systems

GYLON® and GYLON EPIX® Style 3504 have been tested by the Federal Institute for Materials Research and Testing (BAM) as part of the program “Characterization of polymer materials before and after storage in hydrogen.”
Results showed excellent material stability, confirming its suitability for safety‑critical hydrogen applications.

As with all third‑generation GYLON® PTFE materials, sealing tightness is validated via EN 13555 testing using helium, a molecule smaller than hydrogen. This ensures confidence in leakage performance, even for the smallest gas molecules.

Since hydrogen applications fall under TA‑Luft, Style 3504 supports the required leak‑tightness verification according to EN 1591‑1 and VDI 2290, including creep behavior and surface pressure limitations.

Product Features & Performance Advantages

Wide application range with strong unloading capability (QSmin/L = 3 MPa*)

Extreme temperature resistance from –268°C to +260°C

Stopped cold flow, supporting long‑term sealing integrity

High load tolerance with QSmax of 230 MPa*

Excellent sealing for high‑pressure and vacuum duties

Outstanding chemical resistance across diverse media

Available with inner and outer eyelets for additional reinforcement

Good electrical insulating properties

Resistant to weathering and UV exposure

Unlimited shelf life, supporting long‑term storage and maintenance planning

Ideal for Key Hydrogen Sectors

GYLON EPIX® Style 3504 is suitable for a wide range of hydrogen applications, including:

Hydrogen electrolyzers (PEM and alkaline)

Hydrogen distribution and storage systems

Industrial hydrogen pipelines and processing units

Cryogenic hydrogen systems/liquefaction equipment

TA‑Luft‑relevant process connections

Chemical and petrochemical hydrogen processes

GYLON EPIX® Style 3504 | Compressible Sealing Materials for PEM Electrolyzers