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The concrete floor of an entry porch painted dark blue-grey


A simple paint job is an easy and affordable way to give your old concrete floor a fresh new look. Here are some simple tips on how to paint a concrete floor, so that it adds value to your home.


1Check for moisture

First, it's important to make sure your concrete doesn't have moisture rising up through it. If it does, the paint won't stick and will peel off. To check for moisture, lay a plastic bag on the concrete and tape it down so that it's sealed. Leave it overnight and check it in the morning to see if there's any moisture on the plastic. If there is, you'll need to get advice on the products you'll need to use.

A bare concrete floor of an entry porch

2Check you concrete isn't sealed

Check that your concrete doesn't have any sealant on it by sprinkling some water over it. If the water's absorbed, it's fine. If the water beads, it has a sealant on it that'll need removing using acid or an etching agent.

Drops of water on a concrete floor

3Clean the concrete

Use a garden hose or a high pressure cleaner to remove any dirt, sand or debris from the concrete. Then use a hard bristle broom to get rid of any ground in dirt on the concrete. 

A person sweeping a wet concrete floor with a hard bristle broom

4Apply an acid wash

Put on your safety gloves and respirator before handling the acid. Depending on how damaged and stained your concrete is, you might not need to dilute the acid. If it's not too bad, you can dilute it in a bucket of water. Use a hard bristle broom to apply the acid and scrub all of the concrete. Then hose the mixture off.

A person wearing protective gloves pouring acid into a bucket

5Apply the etching agent

Applying an etching agent creates a nice bonding surface for the paint. Put on the protective gloves and respirator. Follow the instructions and mix the agent in a bucket of water. Use the hard bristle broom to apply the etching agent and scrub all of the concrete. Rinse off the etching agent with a hose and let the concrete dry.

A person spraying a concrete floor with water

6Mask around the edges

To protect your brickwork and walls around the concrete floor, place masking tape around the edges. This will also make it easier when it's time for cutting in the paint with a paint brush.

A person putting masking tape around the base of a brick wall at a front door

7Cut in the edges

Thoroughly stir the paint in the can before you use it. Also read the instructions on the paint can because it may need a primer, especially if your concrete has previously had paint or sealer on it. Pour the paint into a roller tray, then use a paint brush to cut in around the edges of the concrete floor.

A person painting the corner of a concrete floor with a paintbrush

8Paint the rest of the concrete floor

After you've finished cutting in, use a roller on an extension pole to paint the rest of the concrete floor. 
A person painting a concrete floor with a roller

9Remove masking tape

Once the paint has dried you can remove the masking tape. Don't leave it too long, as some tapes will stick to your wall.

The concrete floor of an entry porch painted dark blue-grey

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Health & Safety

Asbestos, lead-based paints and copper chromium arsenic (CCA) treated timber are health hazards you need to look out for when renovating older homes. These substances can easily be disturbed when renovating and exposure to them can cause a range of life-threatening diseases and conditions including cancer. For information on the dangers of asbestos, lead-based paint and CCA treated timber and tips for dealing with these materials contact your local council's Environmental Health Officer or visit our Health & Safety page.

When following our advice in our D.I.Y. videos, make sure you use all equipment, including PPE, safely by following the manufacturer’s instructions. Check that the equipment is suitable for the task and that PPE fits properly. If you are unsure, hire an expert to do the job or talk to a Bunnings Team Member.