Using a self-leveling floor compound (this one is @sika_canada L125) will help ensure that the concrete is completely flat before you lay the tiles. Four litres of water and one bag of Sika 125 is what you need to mix in a bucket. The great thing about this product is that you don’t need to level by hand. You can apply manually or by pump. Just pour it on your concrete floor. A primer is important to create a base and ensure good bonding of upper floor layers. Don’t skip this step. To apply it,