Hello all! 2 years ago, we had our pool resurfaced, and part of that job was cutting out a width of the cantilevered deck and installing stone coping. Previously, with the soil expansion and contraction in Dallas, there was a seasonal gap at the grout line between the decking and the tile as the (very long and wide) decking raised and lowered. Now, that transition is now at the grout line where the decking meets the stone. Picture attached for your viewing pleasure The grout is still pliable and rubbery- and at some point (manual watering the surrounding soil doesn't help much, and not at all in certain places where there's no soil access anywhere close), this will seal back up (and the repeat). I'm not exactly sure which grout type was used here, but is there an alternative I can use to replace what's here that will give be even more spreadable that what I've got?