ATP AT-205 for main seal leak

[70pumpkin]

Believe I have a tiny leak at the main seal.  Past posts say that AT-205 seems to work (or can't hurt to try).  Has anyone recently had success using it and/or has anyone found something else? 

[three two barrels]

I've been told that a little bit of brake fluid added will do the same thing.
I personally have not tried it though.