Quote:
Originally Posted by Gelbster
The newest seals are polyurethane which is much more durable than the old ones.They are however, very tedious to fit correctly.
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Actually, the updated RMS seals are a PTFE material which was designed to correct the problems encountered with the original Viton seals.
I would not hesitate to replace your original Viton seal with the PTFE unit; they are inexpensive and do an excellent job. As mentioned, all surfaces must be scrupulously cleaned and you should not touch any of the new RMS surfaces without wearing latex or nitrile gloves as even finger prints can cause leaks. Do not use any type of sealant and be sure it is installed straight and to the correct depth.