I love Hylomar!!

Same ,leaking 518 pan. Gaskets, moroso re usable, stock pan, derale pan...
Still gets wet at the front and leaks drops.

Irritating.
I used to have great luck using a little 3M adhesive between the gasket and the pan letting it set and then cleaning with some alcohol on a rag the edge of the transmission surface and then just bolt it together with a 1/4 drive.
Might just try that again.