Seal on GDL

The elastomeric Seal-on-GDL is an over-molded seal integrated onto the GDL and compressed between the bipolar plates of the fuel cell.

The elastomer seal prevents fluid leakage and crossover while effectively compensating for tolerances of the adjacent components due to thermal expansion/distortion.

The bead seal profile can be designed according to required contact pressures and reaction forces.

Elastomeric materials and GDLs developed by Freudenberg and NOK meet all requirements of the fuel cell environment and lifetime operation.

For low temperature PEMFC/ DMFC applications, we also offer polyolefin elastomer for improved lifetime with superior hydrolysis resistance especially for truck and stationary applications.