Eheim professional II

[Tlodder]

Guys

I have just replace the seal and covered it in silicone grease yet the bugger still is leaking around the seal.
Any one know if this is a common fixable problem

 

[Tolak]

Try a double gasket, old Magnum 350 trick.

 

[Tlodder]

Try a double gasket, old Magnum 350 trick.

Tried that, the old gasket is far to hard and has little or no compression capabilities can't even get the top down.
I was think of using some bath sealant as a base layer, let it dry then put the gasket on. Trouble is, is how to get a small enough and uniformed bead in the gap?