When we had our terracotta floors restored about 8 years ago, the restorer recommended Lithofin Easycare to maintain the finish,
I've used this ever since and am very happy with the appearance of the tiles. It gives a lovely sheen and has no build-up, so one doesn't have to periodically strip old wax from the floor.
The 5 litre container is, by far, the most economical and time saving way to buy it and Jaxon has the best price.