Prep first
Before you start
- Check the grout type and the tile before you buy anything.
- Sweep or vacuum loose dirt, then wash with mild soap and warm water.
- Put on nitrile gloves and eye protection before any acid comes out.
- Keep the tile wet for an hour before any acid goes on.
Cement haze on tile is a thin film of grout left on the surface after the final grouting step. If it's still fresh, it may buff off during the grout's first 12 to 24 hours of curing, but once it has cured it needs a mild acid to break down. That acid is what makes this tricky, since it can etch marble, limestone, travertine and some glazed tile.
Have a few microfiber cloths nearby so you can wipe the haze as it lifts instead of letting it dry on. Keep anything acidic away from natural stone, and go milder on epoxy or premixed grout. If the haze has hardened, a tile pro can tell you whether it's worth another try.
Before you start
What tile can take
Safe to use1
- Water
Use with care7
- Hot water
- Soaking
- Chlorine bleach
- Solvents (alcohol, spot removers)
- Acids (vinegar, lemon)
- Scrubbing and abrasives
- Heat, once the stain is out
7 items
What you'll need
Tap an item to get it on Amazon, or tick what you already have.
- Nitrile gloves and eye protectionAcid remover can irritate skin and eyes. (opens Amazon)
- Acid cement haze remover, concentrated or ready to useIt breaks down cured cement haze on acid-safe tile.
- White nylon bristle brushIt scrubs the grout without scratching the tile. (opens Amazon)
- Soft clothsThey wash loose dirt without marking the glaze. (opens Amazon)
- A sponge (opens Amazon)
- Plastic bucketAcid stays out of metal containers. (opens Amazon)
- Mild soap and clean waterThey lift loose dirt before the acid goes on and rinse everything away. (opens Amazon)
As an Amazon Associate we earn from qualifying purchases.
6 steps
Step by step
Step 1 of 6
Check the grout and tile first
Cement grout haze takes an acid cement haze remover, but epoxy or premixed haze needs an epoxy haze remover instead. Then confirm the tile can take acid, and test the remover on a small hidden spot before the full job.
Careful. Acid on marble, limestone, travertine or a metallic glaze can etch, lighten or change the color.
Step 2 of 6
Sweep and wash the loose dirt
Sweep or vacuum loose dirt off the tile first so it doesn't turn to paste. Then wash the tile and grout with mild soap and warm water on a soft cloth, and rinse with clean water.
Tip. Use a soft cloth, not a scouring pad, so the glaze stays intact.
Step 3 of 61 hour
Soak the tile and grout
Saturate the tile and grout with clean water for at least one hour before any acid goes on. Keep the surface wet while you wait, so the remover reacts with the grout evenly.
Careful. Acid on dry tile or grout can work unevenly.
Step 4 of 6
Scrub the haze in small areas
For light haze, mix the concentrated remover 1 part to 3 parts water in a plastic bucket; for heavy haze, use it at full strength. Brush it onto a small area with a white nylon bristle brush, scrub the grout lines, and move to the next area.
Tip. Work in small sections so you can flush each one before it dries.
Careful. Don't let the solution sit longer than it takes to scrub.
Step 5 of 6
Flush the acid off right away
Rinse each area with clean water immediately after brushing, before the acid can dry on the tile. Don't go back over the same spot with more acid straight away.
Step 6 of 6
Rinse fully and let it dry
Rinse the whole floor or wall one last time with clean water, since acid and alkaline cleaners often need several rinses. Let the tile dry completely before you judge the result.
If you'd rather buy than mix
Best products for cement on tile
Look for a cement haze remover labeled for cement grout, and make sure your tile can take acid before you buy. Epoxy haze needs a separate epoxy remover.
Amazon Basics Microfiber Cleaning Cloths
e-cloth General Purpose Cloth
How we picked these: each product is made for this type of stain, its maker doesn't warn against using it on tile, and its directions fit the steps above.
Finished the steps? How does it look?
Nice work. Let it dry completely and check it again in good light. Here is what done looks like:
How to tell it's really gone →A faint mark usually needs one more round, not a stronger product.
Heavy buildup usually takes more than one round.
Heavy or long-standing buildup →When to call a professional →How to tell it's working
The grout should look even in color once the haze is gone, and the tile should show its own gloss without a milky film. Check in daylight after the surface is fully dry, because leftover haze often shows most clearly once it dries.
What changes for yours
Adjust for your tile
Marble, limestone or travertine
These stones can etch, lighten or change color with acid, so skip the acid haze remover completely. Use mild soap and warm water on a soft cloth for loose dirt, then rinse with clean water.
If the film is still there once dry, leave it alone rather than trying anything stronger on stone. Keep these stones off the acid steps entirely.
Epoxy or premixed grout
The acid cement haze remover is not for epoxy or premixed grout haze, so don't use it here. Use an epoxy haze remover instead, and follow its label for the amount and contact time.
The sweep and wash steps still apply first. Test the epoxy remover on a small hidden spot before the full job.
New grout
Don't acid-clean new grout before it has cured, since concrete and grout should cure at least 10 days first. Until then, wipe the haze with a soft cloth and clean water only.
If the film is still there after the cure, follow the acid steps as written, starting with the test on a small spot.
Glass tile
Glass tile can't take scouring pads, steel wool or sandpaper, so wipe it with a soft cloth and mild soap and warm water. Don't scrub it with metal or other hard objects either.
If you still need more than that, test a small hidden spot before using any acid, and stop if the surface looks dull or marked.
Heavy build-up on tile
For heavy soil sitting on top of the haze, use a non-abrasive cleaner recommended for glass or tile. Leave it for 3 to 5 minutes per the product label, then rinse with clean water.
Do this before the acid step, so the acid reaches the bare grout instead of the soil.
Heavy or long-standing buildup
Old haze that has sat on the tile for months is harder to shift, but the same acid steps apply. For heavy haze, use the cement haze remover at full strength instead of diluted, and keep the tile soaked before you start.
If the haze dried on before you could clean it, scrub the dried film with a white nylon bristle brush wet with the solution, one small area at a time. Flush each area with water right after brushing, before it can dry again.
Realistically, one full pass removes most cured haze, though a faint film may stay in the grout lines. Don't keep repeating the acid, because repeated acid washing can damage the surface. Let the tile dry fully and check it in daylight before deciding on anything else.
Vinegar, baking soda, peroxide and more
Do home remedies work on cement on tile?
Most kitchen and bathroom remedies don't touch cured cement haze, and some can damage the tile or grout. An acid cement haze remover and a mild soap do the work on tile, so most common remedies add nothing.
Skip5Avoid1
What makes it worse
Mistakes to avoid
Don't mix a haze remover with other cleaners
Keep the haze remover on its own, because mixing it with other cleaners or chemicals is dangerous. Rinse the tile fully before you use anything else on it.
Don't use fluorine-based cleaners on tile
Cleaners with fluorine compounds damage ceramic, glass and stone. Check the label for fluorine before you buy, and skip any product that has it.
Don't leave no-rinse cleaners on tile floors
Residue from no-rinse cleaners reduces slip resistance on a floor. Rinse the floor with clean water after any cleaner you use.
Don't put acid in or near metal
Sulfamic acid shouldn't be mixed in a metal container, and acid removers should not touch metal fixtures or objects. Use a plastic bucket and keep the acid off trim and fittings.
When to call a professional
If the haze won't come off after one careful pass, or you can't tell whether the tile is stone or a metallic glaze, stop and ask a tile setter or a tile-cleaning service before going further. Acid mistakes on stone are hard to undo, so pausing is the safer move.
Questions
Is grout haze the same as a stain?
Not quite. Grout haze is a film left on the tile by the final grouting step, not a stain soaked into the surface. It's usually buffed off within the grout's first 12 to 24 hour cure, and once it has cured, you need a mild acid to break it down.
Can I use vinegar on cement haze?
Avoid it. Vinegar can etch cement grout and damage marble, limestone and travertine. Use the cement haze remover from the steps instead, and only on tile that can take acid.
Does baking soda remove grout haze?
Not cured haze. Baking soda is a gentle cleanser, so it can lift loose dirt, but it won't break down cured cement haze. Use mild soap and warm water for loose dirt instead.
Can I use an acid remover on epoxy grout?
No. An acid cement haze remover is not for epoxy or premixed grout haze. Use an epoxy haze remover for that film and follow its label.
When does grout haze need cleaning?
Grout haze is usually buffed off during the grout's first 12 to 24 hour cure. Once it has cured, you'll need the acid steps, but only after the grout has cured for at least 10 days.
What if the haze is still there after one try?
Let the tile dry fully and check it in daylight before deciding anything. Repeated acid washing can damage the surface, so don't go straight back in with more acid. For grout lines that are still stained after cleaning, see our Grout guide.
Cement on other materials
Other stains on tile
Start from the bigger picture
How we know this
Every method, amount and warning here comes from university extension services, industry bodies and product makers. We read them, check every step for unsafe combinations and changed amounts, and write it up so you can follow it.