Air con washers/seals?

[Lincsls1]

Hi guys.
About to replace the 2 washers/seals that sit between the compressor and pipe connections on my Astra H diesel.
I have got proper seals.
My question is am I supposed to put any grease or other type of lubricant on the seals before tightening them down or do I just pop them in dry?
Cheers...

[E-bmw]

Shouldn't need anything, but if they are in an exposed area I could be tempted to use a thin smear of silicone grease.

[Chris32345]

A quick dip in pag oil then let excess run over before fitting wouldn't hurt assuming a 134a system anyway
It's the oil that's in the system to keep it in use