Front timing chain cover sealant?

Here are the choices I would use if I were doing the job.

Permatex Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker:

Permatex The Right Stuff Gasket Maker:

Loctite 5699 Grey RTV Silicone Gasket Maker:

HondaBond 4 RTV Silicone: Although it's a product from Honda, it is widely used across different makes and models because of its reliability and strong sealing properties.

Let us know if you need anything else.

I forgot to ask. how thick the bead should be?

It should be about 1/4 inch wide and 1/16 deep the best you can, make sure to seal along the inside of the bolts holes.