Not used Aqualoc but I layed the TileLoc flooring in our kitchen a couple of
years back. Didn't seal anything - just layed it an left it The TileLoc
stuff seemed to quote the same claims as the AquaLoc.

Despite a washing machine pumping out behind the units and leaving it soaked
for several weeks it is fine. In fact, an offcut has been outside for two
winters now (I left it on the wall out in the garden to see what it would do)
and it still clicks together perfectly.

Very impressed.