“what "grease" do you use to help stop the leak??”

Sorry for the long delay on the answer. Since I don’t have to use it that often, I couldn’t remember, then I forget to go look.

I use Harvey Silicon Grease
http://www.acehardwareoutlet.com/(ixasf0ugp54pxg45rwugnfv5)/ProductDetails.aspx?SKU=4095667&
I use this on my little things (like hydration packs) and on my whole-house filter. That filter o-ring is 10 years old and still going strong because of this grease.

-Barry