Why Use Rubber O Rings?

[shawng]

For many months, when I have converted pens into eye droppers I never found the necessity of using rubber O rings. I personally find that they loosen the seal between the section and barrel. Any thoughts?

[Randal6393]

Do you use silicon grease on the threads instead? Do you grease the O rings? Never had much use for eyedroppers but when I have used them, did not see much difference between a non-O ring and O ring eyedropper.

 

Enjoy,

[Strombomboli]

I as well don't find o-rings necessary. I just use silicon grease, and no accidents ever happen.

Edited July 30, 2014 by Strombomboli

[Charles Rice]

Actually, I've had good success using nothing. But I don't do it very often. I just don't see the need.

[shawng]

Do you use silicon grease on the threads instead? Do you grease the O rings? Never had much use for eyedroppers but when I have used them, did not see much difference between a non-O ring and O ring eyedropper.

 

Enjoy,

I use a generous amount of silicon grease, and I haven't had an issue yet.

[penrivers]

They look bad in the section and feel unfit in the fingers. Jut silicon grease and tight the section to barrel.