Does anyone knows of a good permanent sealer we could put on a linoleum floor instead of wax?

So one of our kitchens (we live in a duplex, and are renting the bottom half to the inlaws) has a really awesome inlaid linoleum floor. We’re guessing 50’s, but not sure.

The classic treatment on linoleum is wax—we tried a self-cleaning low-buff wax, but any kitchen drips or messes stain the wax permanently (you can buff them out with more wax, but that’s complicated).

I’m wondering if anyone knows of a good permanent sealer we could put on the floor instead of the wax?