How long will homemade pimento cheese last in the frig?

This product can last up to a week longer than the use by date. Especially if it is not opened yet. The use by dates are there not for an expiration date but an advice for best used by date.

I'm not sure that it will technically 'go bad', but after a while it may start to lose it's strength. As long as you keep it in a good container, don't expose the bottle to too much sunlight or cold,...

It depends. some last for a year, and some last for a few months.

forever if you put it in the bathtub.

This food can be frozen for storage. You can place the food in an airtight container. It will stay fresh for up to 2 months stored in this way.