I used Permatex Hylomar with a dab of The Right Stuff at each end of the crank shaft seals. I am not using a one piece seal, I used Moroso
oil pan gasket seals. No leaks. I used the Hylomar when I installed the 2 piece rear main seal and again,no leaks. I had intake gaskets leaking
oil and hylomar solved the problem. It's like Franks Hot Sauce, I use that s__t on everything!