Just coming to the end of my bathroom refurb and although i was going to get a tiler in im sorely tempted to do the tiling myself, as was my original plan. My question about BAL-apd is ive prepared the walls 2 of them plasterboard with a skim of plaster and if i use BAL apd as the primer is there a time limit after i have applied it till i tile. I dont mean time to let it dry/soak in before tiling, i mean could i put it on say tomorrow and not tile for three weeks or more say.