How to Paint Concrete Blocks
A fresh coat of paint can liven up dingy concrete, whether the concrete blocks are part of makeshift bookcases or a garden wall. Like most surfaces, for a quick and easy color change you can simply dust off the concrete and apply a good latex or acrylic paint. This is suitable if you just need or want a temporary fix and intend to paint over it again later.
For a more permanent solution, however, there are some things you must do to make sure that paint sticks well to the concrete blocks and lasts longer without fading or chipping.
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Things You'll Need
- Abrasive sponge
- Water
- Soap
- Towels
- Paint brush
- Paint roller
- Roller pan
- Latex paint
- Concrete sealer
Instructions
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How to Paint Concrete Blocks
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1
Brush off the concrete block with a stiff bristled paint brush. Follow this by scrubbing the surfaces with a slightly abrasive soapy sponge soaked in water. You should remove as much dirt as possible to create the ideal surface for painting. Use a towel to wipe excess moisture off the concrete and then allow it to air dry.
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2
Apply concrete sealer (block filler) to the concrete with a paint brush or roller, depending on the size of the area to be treated. Allow to dry completely.
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3
Paint concrete surfaces with a roller brush or paint brush. Use long strokes to apply paint as evenly as possible. Allow this layer to dry completely--humidity and type of paint used will determine how long this takes, but plan on the drying time to take about a day.
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4
Add another layer of paint to all surfaces. Allow this to dry and then you can add another layer for more vibrant color if necessary.
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5
Apply sealer to the dried, painted surfaces. This will further protect the paint from fading and chipping.
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Tips & Warnings
If you have a large area to paint, such as concrete block walls, try cleaning them with a pressure washer instead of a sponge first. If painting a single block rather than a wall, paint all exposed sides and let dry for at least a day before turning it to paint the other side.
Make sure you are in a well-ventilated area when using paints and sealers--both expel fumes that can be harmful to your health.
