Spray on polymer sealant rear main seal fix effectiveness?

Rockandrattle

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I'm pretty sure my rear main seal is leaking. I see that Permatex and others have a spray on sealant that can be used to seal the joint between the upper oil pan and the transmission case and stop the leak. Has anyone had success with this approach? I don't want to pay the bucks for the repair and I'm not equipped to pull an engine.
 
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