ADAPTALL 14MM SS BONDED SEAL

Stainless steel provides decent corrosion resistance, so it should be okay for incidental exposure, but I wouldn't recommend it for constant contact. It's really designed for hydraulic circuits that might see moisture or get washed down regularly.

For a 14 mm metric hydraulic connection, this bonded seal is meant to sit between the male threaded fitting and the port or boss to make a face seal.

For a leaking face seal on a metric port, a bonded seal is exactly what you want. The construction bonds a metal washer to a captive elastomeric sealing element, so when you torque the fitting down it compresses evenly and centers itself automatically. That self-centering behavior is a big part of why these outperform loose washers in applications where repeat assembly is common. The 14mm size matches standard metric port fittings of that thread diameter, so as long as your fitting is the right size, this should address the weeping you're describing.