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How to Paint a Concrete Hearth to Look Like Stone

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In my last post I showed you how I transformed my brick fireplace using a fake stone product called AirStone. If you would like to see how I did it you can find the post here – DIY Budget Fireplace Makeover.

DIY Stone Fireplace Makeover on a Buget

Today I am going to show you how you can paint a concrete hearth.

For Part 2 of my fireplace makeover – I painted the grey concrete hearth in front of the fireplace using a faux stone paint technique.  The original grey color of the concrete hearth looked off and the builder never finished off the edges so it was time to finally get it the way I always imagined.   With the help of some craft paint, sealer and AirStone, I was able to make the hearth look like it perfectly belongs with the new stone fireplace.

BEFORE: Fireplace Hearth

Grey slab with unfinished sides.  The dark streaks are just water that has not dried.


I never liked the gray and love the Autumn Mountain color of the AirStone so I went to work to get the two to look more in the same color family.

Faux Stone paint techniques

AFTER: Faux Stone Painted Fireplace Hearth

Faux paint Technique Stone

How to Paint a Fireplace Hearth


supplies needed:

AirStone Adhesive
Molding:  3/8″ x 1-1/4″ Painted Stop
Hack Saw
Miter box
Craft paint – Beige, Grey, Brown, Yellow Ochre.  I used Martha Stewart – Wet Cement, Apple Barrel Beachcomber Beige, Folk Art Yellow Ochre, Folk Art Butter Pecan, Apple Barrel Nutmeg Brown, Folk Art Linen.
Glaze – I used Martha Stewart Crafts Glaze, but any glazing liquid will work.  Valspar and Ralph Lauren each make one. 
Sea Sponge
Plate to mix paint on
Clear Matte Water Based Sealer  – a craft paint sealer will work fine. 
1/8” or small tipped paint brush
Wet Rag 
How to paint a fireplace hearth

The height of the AirStone was about 1/4” too short to match the height around the edge of the hearth.


To solve the problem, I added white trim molding around the hearth to lift up the AirStone so the top of the AirStone would be the same height as the hearth.

The builder of my house never finished the edge around the hearth and left the floor very uneven.  Since the floor is uneven a few stones are slightly raised and a few are slightly lower.  In a way, this looks pretty natural.

AirStone-Around Fireplace Hearth

I wanted to nail the trim molding to the floor, but the wood floor is not thick and is directly on concrete, so I decided to use Liquid Nails to attach the trim molding to the floor.  Once that was secure, I added the stones using the AirStone adhesive.


How to Paint a Surface to Look Like Stone


1.  Place a dollop of paint from each color of craft paint onto a plate. In the middle add about 1/8 of a cup of glazing liquid.

How to create a stone surface with paint

2.  Dip a wet and then rung-out sponge into the paint a few times to mix the colors just a bit – not too much as you want to have color variations. Start dabbing the sponge onto the surface turning the sponge all different ways as you work.

Stone - Faux painting tutorial

3. Keep dipping the sponge in your paint and continue dabbing the surface to mottle it with paint.  Note: You can see the stone color with which I was trying to coordinate the hearth color.

How to paint faux stone

4.  Let dry.  Add a few more layers of paint following the same dabbing technique using the paint and glaze mixture until you are happy with how it looks.  Dab the paint on an angle, not in straight lines – it will look more natural.  If one spot looks too heavy, dab a damp rag over the surface to remove some of the paint.

5.  Once you like how it looks, apply 2 coats of matte water-based sealer to protect it. Let the first coat dry before applying the next.

How To Add the AirStone Stones to the Side of The Hearth


1.  Figure out how many stones you will need and line them up. Cut any if necessary to fit.  I used two corner pieces, the rest of the stones were the flat edge type.  Apply the adhesive to the back and press into the side of the hearth, letting the adhesive ooze out of the top. Use a wet rag and your finger to clean the adhesive off the painted hearth.  Repeat on all the other stones and let dry.

Note:  You can add the stones around the hearth before painting the hearth.

Faux Stone Painting Tutorial

The adhesive is white. When it was dry, I went around with a thin tipped paint brush using cement colored paint to make the adhesive look a bit more like mortar.

Faux Stone paint technique

All done. Now the fireplace transformation is complete and I am one very happy DIYer.

Image shows hearth getting painted and finished. Text overlay says Painted Hearth

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  1. I can’t wait to try it. You always introduce the best products. Thank you as I had given up on ever having my fireplace redone!

  2. This is absolutely brilliant, Diane! We have a fireplace in our family room and it is very very dated! It could use a big facelift.
    What a beautiful inspiration your fireplace is. I wish I could order one just like it, or make it!!!
    Please join TUTORIALS TIPS AND TIDBITS, my weekly linky party. Linky goes live Wednesday evening at 8:00. I would love your wonderful blog and masterful fireplace to join us!!!!!