EmerClad is simply a
acrylic waterproofing membrane. Used on roofs, walls and floors in wet areas and similar. It takes a few coats and dries easily, tough, UV resistant but remind slightly flexible so the membrane does not crack.
Admittedly EmerClad is extremely good and very tough, but similar products are available in most countries. We also have K10 here which some applicators seem to favour.
Trick to using these membranes is to remember you are trying to achieve an actual membrane - lay it on thick, do not roll out too hard and a normal roller nap leaves quite a good non-slip surface so your bum will stay put without being carved-up or sanded.
Roger