Grease for O Ring

[Traveller]

Hi all.

Is it possible to tell if an o ring is made from natural or synthetic rubber (the one below in this case)?

https://www.amazon.co.uk/Vaillant-Pressure-0020059717-0020040508-Genuine/dp/B09LSCY7WG/ref=sr_1_9?crid=1Q6M5WHXVUP4V&keywords=Pressure+Sensor+0020059717&qid=1697737685&sprefix=pressure+sensor+0020059717%2Caps%2C122&sr=8-9

If it is synthetic, would petroleum jelly/Vaseline be just as good as silicone grease?

If it is natural, is there an everyday/cheaper alternative to silicone grease? £3-£4 is still an expense/delay I could do without!

Thanks.

 

[Madrab]

If it is synthetic, would petroleum jelly/Vaseline be just as good as silicone grease?

If it is natural, is there an everyday/cheaper alternative to silicone grease? £3-£4 is still an expense/delay I could do without!

If it's to do the job properly then £3-£4 isn't false economy. Vaseline is mineral based and can degrade natural or synthetic O-rings. Don't believe there is an everyday alternative though I'm sure the GSR that's doing the job will have some with them.

 

[Traveller]

Thanks Madrab. In that case, 'quickly' will have to be sacrificed in favour of 'properly'.