With standard tile adhesives, you may find there’s not enough time to cut and install your tiles, and so you must remove your applied adhesive and replace it with freshly mixed material; or your adhesive has simply gone off in your bucket and you need to throw it away and mix a fresh batch. This is particularly common in summer, with higher temperatures causing them to skin over much quicker. To reduce waste of skinned over tile adhesive, use one with an extended pot life and open time for better longevity from the very outset. ARDEX MICROTEC X 77 for example has a pot life of 3 hours and an open time of 60 minutes!