cimex encap is a good product .but imo overpriced , try the new range of encap solutions from john kelly, i found really good and one of the better products i have experimented with over the last cpl of years..
as for the problem of post vaccing , its not a problem ! i have said it many times on this forum, ensure the inhouse cleaners vaccum the next day , make it clear to the person you are dealing with, never yet had one refuse. and for saying you might as well h/w/e do me a favour, a cimex will clean 300 sq mtres an hour it will give you better results when a problem with wick back may be apparent, and for water marking its brilliant .
geoff