O ring grease- ?

Hi all,

Recently started using an Oly housing for the sp 350, reading the manual find that Oly insists using only Oly supplied grease, which they claim is special , for silicone O rings.

Is that true ? what is special about this grease, that in case I finish this OEM supplied tube, I cannot use regular silicone grease which I use for other dive gear. It is just lube right ?

Shil

Hi all,

 

Recently started using an Oly housing for the sp 350, reading the manual find that Oly insists using only Oly supplied grease, which they claim is special , for silicone O rings.

Is that true ? what is special about this grease, that in case I finish this OEM supplied tube, I cannot use regular silicone grease which I use for other dive gear. It is just lube right ?

 

Shil

The old school guy in me says grease is grease but I only use Oly grease. I read somewhere that some greases can cause an oring to swell and distort.

Hi Shil,

Don’t use normal silicone grease on silicone o-rings.

You can’t use silicone grease on silicone o-rings. You can use this grease on polyurethane o-rings, or other plastics, but not silicone.

You have to use fluorosilicone grease on silicone o-rings

A while ago I wanted to find and alternative and after a lot of researches I found out that it was my fault if I damaged some o-rings. They all swelled up. I bought fluorosilicone grease and it did work.

Look at these sites.

http://www.efunda.com/designstandards/orin...;SC=Sea%20Water

http://www.camerasunderwater.info/articles/maint.html

http://www.dowcorning.com/applications/sea...amp;country=HKG

I ultimately advise you to use the original grease. Different housing use different plastics for the o-rings and the grease may damage them.

alex