Does anyone know what they may have used?
It is a product called traffic topping.
It is to early to tell, so far it is holding up well, but will need to get through the winter to really see.
We usually do projects around the washes ourselfs,but this was hired out. I will PM you the guys name and number , and you may contact him to discuss the product,and application if you wish.
Bascially the floor needs to be dry,then slightly grinded,cleaned of all dust, then the first coat is applied with a very fine gradular sand put on top, cleaned agian, then within 24 hours the topcoat must be applied,then 24-36 hours to cure.
You cannot get it wet during the whole process