One Coat Plaster

I've used some one coat plaster to repair a wall ready for tiling. There is an area at the bottom which is not drying out fully after 3 days. It's feels solid but is darker than the rest of the area. It's probably the deepest area at about 20mm so how long should it take to dry?

The Apprentice

Well-Known Member
It will be dependent on lots of things, the suction of the substrate, temperature, depth etc to give you a specific answer. You will be able to see when it is dry due to the colour change.