Sealant for Interior Brick Wall

Hello,

We have an interior brick wall that we would like to accomplish two things with: 1) enrich the color (or darken the brick tones) and 2) have a shine to the brick surface. We have tried both of the stone sealers that Loewe's sells on test brick (one was high gloss - poor result). We know not to use polyutherane on the brick. But what products will do what we want? We have seen this done in restaurants. Thank you.