Hello,
We are in the process of building a wall where we started by laying the first row with fix to level the ledge, the rest of the layers are glued.
http://i.imgur.com/LdOd72K.jpg
However, we have ended up with some fairly large holes here and there after adjustments that need to be filled:
http://i.imgur.com/5Cts7M2.jpg
Previously, we have used fix but I'm a bit concerned about how well it really holds in the long run. Maybe we should use some soft sealant here instead, like Tec7 in the right color?