I'd recommend a two step process. First use the Drylock as a "primer." Then use a good epoxy based paint to cover. You will need to check to make sure the two are compatible though. The idea is the Drylock will take care of any water vapor coming through the slab and the epoxy paint protects the Drylock from wear.

Any basement will have some humidity coming up through the slab from the soil. The question is how much. JBMat's suggestion is a good one to indicate how much is actually coming trough. Although I would suggest a good inverted 5-gall bucket over the plastic with a sand bag on top. If you have too much vapor tape won't stick to anything.