Ok so here goes, bare with me. I had painted an outside storage room concrete floor with bitumen paint. The paint dried and it was fine up until a warm day when it became tacky and stuck to everything. I know, I know, I messed up, I should have known that would happen. I removed pretty much all of it and repainted the floor with a water based primer but even after a week it was still not even close to being tacky let alone being dry so I removed it again with a rag and spirits. After some research I found that aluminium paint can seal bitumen so I painted the floor with a tin of rustins aluminium paint yesterday. Checking on it this morning the paint is again wet to the touch in places and tacky in others but in certain areas there is a brown oily substance forming on top of the aluminium paint, I take it this is bitumen bleeding through? I left hardly any bitumen on the floor so I take it this oil is coming up from beneath the concrete surface? I am at my wits end with this now and cant think of anything else to do. Why is the paint not drying properly? Has the bitumen paint totally buggered the floor?