White filled PTFE flange gasket with chemical resistance for aggressive media in food, beverage, and industrial processing.

Durlon® 9645

Durlon® 9645 is a biaxially-oriented PTFE sheet that combines superior chemical resistance with exceptional sealing performance, making it ideal for demanding industrial applications. Engineered for extreme conditions, it operates effectively from cryogenic temperatures up to +260°C and withstands aggressive media across the full pH spectrum (0 to 14). Designed for applications requiring minimal creep and low leakage, Durlon® 9645 ensures reliable seal integrity where conventional PTFE materials often fail.

With controlled microporosity and a closed-cell structure, Durlon® 9645 offers excellent compressibility and sealability, even at low bolt torque. Its compressible PTFE surface layers conform to warped, pitted, or scratched flanges, while the rigid PTFE core minimizes cold flow and creep, enhancing durability and installation ease. Ideal for low torque applications such as glass-lined flanges, it provides a superior alternative to envelope gaskets, ensuring robust sealing performance and long-term reliability across various industries.

Tech Sheet
Industries Chemical Processing , Marine , OEM Services , Food & Beverage , Mining , Oil & Gas , Pharmaceutical , Power Generation , Pulp & Paper , Water & Wastewater

The Durlon® 9645 product range offers a biaxially-oriented PTFE sheet solution that combines superior chemical resistance with exceptional sealing performance, making it an optimal choice for demanding industrial applications.

Engineered to perform across a broad temperature range from cryogenic conditions up to +260°C, Durlon® 9645 is suitable for handling aggressive media spanning the full pH spectrum (0 to 14). This advanced material is designed for applications requiring minimal creep and reliable seal integrity, particularly in scenarios where low leakage is critical, and conventional PTFE materials fail to meet the requirements.