Yes, you can limewash a brick fireplace surround, whether the brick is bare or already painted, and you can limewash a painted drywall (sheetrock) surround too. This guide walks you through it in order: where limewash can go, which kind of surface you have, and then the steps for your surface.
The short version
- Limewash goes on the brick around the fireplace, never inside the firebox or anywhere flames and direct heat reach.
- Bare brick: just limewash. Nothing else.
- Painted brick: a primer coat first, then limewash with a hardening additive mixed into the last coat.
- Painted drywall: the same as painted brick: primer, then limewash with the additive in the last coat.
Where limewash can and can't go
Limewash is made from mineral lime, so it won't catch fire. But it isn't made for direct heat or flame. Think of it this way: it belongs where the brick gets warm, not hot.
Yes
- The brick face around the opening
- The chimney breast above the mantel
- The hearth face
No
- Inside the firebox
- Firebrick
- Anywhere flames or direct heat reach
Every product in this guide follows the same rule.
Densifier and sealers aren't made for high heat. Keep our Densifier and sealers off the firebox, firebrick and any surface that gets hot.
Is your brick bare or painted?
Splash a little water on the brick.
It darkens and soaks in within a few seconds
Your brick is bare. Follow Path A.
The water beads up or sits on top
Your brick is painted or sealed. Follow Path B.
Your surround is painted drywall (sheetrock), not brick? Skip the test and follow Path C.
The products
On a phone, swipe the table sideways to see all paths.
| Product | What it does | Bare brick (Path A) | Painted brick or drywall (Paths B & C) |
|---|---|---|---|
| Limewash | The color. A thin mineral paint that gives the soft, cloudy look. | Yes | Yes |
| Lime-Prep Primer | A base coat that gives limewash something to grip on painted surfaces. | No | Yes, one coat |
| Limewash Densifier | A liquid you stir into the last coat of limewash. It makes the finish harder, with little to no chalkiness, right away. | No: bare brick soaks it up | Yes, last coat only |
| Matte Sealer | A clear topcoat for walls elsewhere in the house. Not for high heat. | No | No |
You'll also need a Limewash Block Brush (limewash is brushed on, never rolled or sprayed), a bucket and stiff nylon brush for cleaning, drop cloths, painter's tape, gloves and eye protection. Wet limewash is alkaline.
How much to buy
- Limewash: a quart covers about 75 sq ft with two coats. One quart handles most surrounds. Brick is thirsty, so round up.
- Lime-Prep (Paths B and C only): a quart covers about 85 sq ft.
- Densifier (Paths B and C only): mix 1 part Densifier to 4 parts limewash, for the last coat only.
Bare brick
That's it: no primer, no Densifier, no sealer. The limewash soaks into the brick and hardens naturally over the next few weeks.
Painted brick
Over paint, the finish will be solid color. The see-through look in Path A needs bare brick.
Painted drywall (sheetrock)
Many fireplaces are framed with drywall instead of brick. The method is close to Path B, and the heat rule is the same: limewash, primer and Densifier all stay outside the firebox and away from direct heat or flame. This path assumes sound, painted drywall; if you've patched it or the paint is glossy, check our prep guide first.
Tip for drywall: on a flat surface, lap lines show more than on brick. Work each face of the surround corner to corner without stopping, so the wet edge never dries mid-wall.
Looking after it
Don't scrub it or use cleaning products. Dust with a soft brush. Densified finishes (Paths B and C) can be dusted with a soft, dry cloth, but keep water off them. When the finish starts to look tired, brush on a light refresh coat of limewash. It blends straight in with no prep.
Other brick and stone
Stone fireplaces: porous stones like limestone, sandstone and fieldstone follow Path A. Dense, polished stone like granite may not absorb limewash; do the water test first.
Brick feature walls indoors follow the same two paths, with no heat limits.
Exterior brick follows Path A only, because Lime-Prep and Densifier are for interior use. Outdoors, the finish weathers gradually. How often you refresh it depends on the weather and how much aged patina you want.
