As an alternative to Acrypol, someone has suggested fibreglass. But a neighbour has said that, like Acrypol, the area needs to be completely dry?
Acrpol does stick in wet conditions,this is one of the reasons its so expensive as it sticks to anything and lasts(google it,check it out),Acrypol or remove imo,if you got the cash remove if not then acrypol it.Fibre glass is not good on concrete.
Ive tried the Acrypol on damp and wet and I'll tell e, it dont like it! I see all these tins of stuff about with blokes painting it on in a rain shower.Its no good,its gotta be dry and I'll tell e why.
The surface wants to be clean of any crap,lichen greasy stuff,the wets going to be covering all that sort of thing up.
All you end up doing is coating the dirty surface,yeah it looks good at the time but it will just peel back very soon.