EPDM Rubber bulkhead gaskets - DIY

[Dukereefnz]

I have purchased a sheet of rubber EPDM... to make gaskets for my bulkheads with a larger diameter to cover the drilled hole, with an oversized chamfer on the inside.
I have made the gaskets and they look good, but the smell... like strong rubber smell.
They have been soaking and it a little better...

Here is the info on the label.

Yes this one is on the outside...
Here is an inside hole, the large gaskets work well.
Also planning a large sheet between the Modular marine overflow box and the back of the glass tank.
In realality there is not a lot off gasket contact with the water...

inside tank, the large gaskets seal nicely...

It is the small..... of the gaskets that worries me.
I can not seem to find anything else suiatable.

 

[Dukereefnz]

Bump...anyone made bulkhead gaskets?
Maybe that would have been a better question?

 

[WarChief]

I literally contemplated this. My seals seem to have held this time. But should they start their crap again this is the route I intended to take.

 

[Dukereefnz]

Worked perfectly - I added silicon to the rubber to fill any holes.
For the overflows I made large sheets that covered both holes.
Not one drop of salt or water - perfectly sealed.

 

[WarChief]

Worked perfectly - I added silicon to the rubber to fill any holes.
For the overflows I made large sheets that covered both holes.
Not one drop of salt or water - perfectly sealed.

Exactly what I planned. Like I said, Its holding for now. lol.... Eventually Ill get in there and change it. Just dont want to mess with whats no broken

 

[Cajun86]

I have used food grade sheet silicone in the past.

 

[WarChief]

I have used food grade sheet silicone in the past.

Sounds smart. The silicone probably requires a little less tightening I'm assuming? Due to it being softer???

 

[Timfish]

I've used DIY EPDM gaskets without any issues. FWIW Since water will migrate down threads past teh nut and any gasket a gasket on the threaded side of a bulkhaed fitting doesn't really do much.