Plastering

How soon can I paint a mist coat on new drywall and what should be the water to paint ratio?

Anonymous user 08/10/2025 - 2:07 PM

This is my first time dealing with freshly plastered walls and I'm a bit uncertain about how to go about painting them. I've heard that applying a "mist coat" is recommended before using regular paint but I'm unsure about how much time to wait after the plastering is done before starting. I've also seen different suggestions on how much water to mix with the paint for the mist coat and I don't want to get it wrong. Could someone please give me guidance on the right timing and the correct water-to-paint ratio?

Revive Painting

Rating: 5 out of 5

5/55 reviews

Ajax

Plaster normally takes 1-3 days to dry depending on humidity. Basements may take longer. It should look uniform and white, not grey or patchy. If you place your hand on the surface and it feels cold it may be still holding moisture. I wouldn’t recommend mist coating. It can lead to poor adhesion, peeling and flaking. Use a dedicated primer/sealer. Apply two finish coats and sand walls with 220 grit paper between each coat. You have smooth results that last a lifetime.

Answered6 October 2025

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AKAHGODWIN

No reviews yet

North York

Immediately after installing drywall, taping and plaster you should allow it to dry properly for sanding which should take approximately 2 to 3 days depending on the humidity of the place. Once it’s properly dried and properly sanded, you can go on with the painting after applying a primer so that it will come out nice and clean. Make no mistake of applying the paint without making sure that the drywall is very dry to avoid paint peeling, change of colour . It’s ever important.

Answered8 October 2025

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