I laid polymeric sand on a patio (made of paver blocks), and it looked great. I followed the instructions, and it didn't rain within about a week of my laying it. It ended up perfect, and it's hard as a rock...when it's dry outside.
When it rains, or I try to wash it off with a hose (from mud getting on it), it gets incredibly soft, and will peel up easily. I noticed the problem about a month after I laid it, and we had a rain. Mud washed onto it, but there wasn't much water. I sprayed the mud down, and got a leaf blower (on the lowest setting), and blew the water/mud off. I noticed a decent amount of the polymeric sand was also peeling off with the mud. Now it looks terrible, but when it dries, it's hard as a rock again, and none of it will budge. Even the flakes that are mostly peeled off are hard as a rock, and won't break off easily.
Is this normal? Did I do something terribly wrong. No matter what, there's no chance of me ever using this stuff again. It looks great, but it was terribly expensive, and now has lasted me about a month.
So, secondary question, is there a way to cover this? I'm not even against the idea of getting mortar and putting a thin layer of mortar over this. I'm not sure a thin layer of mortar is a good idea, but I don't want this stuff washing everywhere and ruining other things when it's wet.