Selecting the right Mortar
THE SHORT ANSWER Use Schluter ALL-Set! We control the formula and the technology. We know it will work over and under our products. Thus the pun behind the name - you are ALL-Set ! THE LONG ANSWER Schluter products are impervious. Tile is impervious. What does that mean? Impervious means, “ not allowing fluid to pass through” . These surfaces don’t breathe. Schluter has stated for years that an ANSI A118.1 non-modified mortar must be used when installing our product (with the exception of DITRA over wood). We took that stance because testing showed that we had better and more consistent curing results with a non-modified mortar than with a modified mortar. Polymers are designed to slow the cure down. With tile formats getting larger and when installed over impervious membranes, when a modified mortar is used there is no control over the rate of cure between those impervious materials. It could be anywhere from 30 to 60 days (maybe longer) before a full cure is achieved. Thus there