This says tintable but I don't see any Cabot tint on Lowe's website. Do I need to add tint or use it as is? I'm staining a cedar fence.

what you have is a tintable base, it is meant to be tinted at the store you purchased the product. There will be some cans at the store that are factory premixed but they are very limited in color selection. You will need to return the base to the store and have the employees tint it for you.