So 100% silicone sealants on your packer.  Is this a really bad idea? I'm so fed up with my Peecock and just want to make this rim around the edge to help keep things from... spilling. 

They make medical grade silicone sealents.

I suppose you could try, but my experience is new silicone will NOT stay adhered to old silicone.

We use aviation grade silicone at work, with a primer to clean the surfaces. With the primer it's permanent, you have to cut or scrape it apart. Without the primer it's likely to pull off in one piece. I'm sure medical grade silicone behaves the same.

Hugs, Devlyn

Ive found GE 1 brand clear 100 percent silicone caulk will adhere with old silicone if u clean with naptha ..u can smooth surface with rubbing alcohol..should work fine.. it has when i tried it..medical grade silicone will not stick..i already tried twice.good luck!

You can definitely try this. I think the dry and clean is really important workign with silicone, which is tricky and unforgiving.

--Jay

Thank you everyone! I'm going to try this out, hopefully it works!