How do I paint over cracks in stucco?

Before you repaint a badly cracked stucco surface, you need to repair the cracks to create a smooth surface for painting. Fortunately, repairing cracks in stucco is a relatively easy job, requiring just a few basic tools.

All you need to repair cracks in stucco is some high-quality caulk, a bucket of water and an old sponge or rag. Latex caulk with a silicone base is a good choice, as it is very durable and long-lasting.

Begin by opening up the tube of caulk. This may involve cutting the top off the tube, in which case you want to make the hole as small as possible, so you can apply the caulk very precisely.

Press the tip of the caulk tube against one end of the crack and gently squeeze to push a bead of caulk into the gap. Keeping the squeezing pressure constant, move the tube slowly and steadily along the crack to fill it with caulk. Try to fill the crack as completely as you can. Don’t worry if some excess caulk spills out of the crack; you can clear it up later.

After applying the caulk, use your finger to press it into the crack, filling every tiny crevice. Next, submerge a sponge or rag into the bucket of water. Squeeze out the excess water and then wipe it over the wall to remove caulk that has spilled out of the crack.

Let the caulk dry for at least a few hours. It might shrink a little as it dries, in which case you will need to apply additional caulk to fill in the gaps. After the second application, wait another few hours, or even until the next day, to ensure the caulk is completely dry. You are now ready to repaint the wall.

Begin by applying primer to the stucco. Use a brush to apply the primer around the edges first and then use a roller to quickly spread it over the rest of the wall. Let the primer dry and then use the same method to apply the paint you’ve chosen. Thanks to your earlier repair work, the original cracks should not be visible in the finished wall.

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