Terrazzo cleaners and sealers: what is safe on your floor

The only cleaner your terrazzo needs is a pH-neutral one, and the only thing that should go on it after a restoration is a penetrating sealer, not wax and not a shine coat. That is the short version of the NTMA’s care guide, and it is the advice we give every customer when a floor is finished. This page goes through the product types you will see in a store aisle and what each does to cement terrazzo.

Cleaners: what is safe

Product type	Safe on terrazzo?	Why
pH-neutral stone cleaner	Yes	The NTMA says only neutral pH materials should be used for scrubbing or mopping
Plain warm water	Yes	Fine for daily damp mopping and rinsing
Vinegar or vinegar-based “natural” cleaners	No	Acid; etches the cement and marble
Lemon, citrus or “orange” cleaners	No, if acidic	Same etching risk
Bleach	No	On the NTMA’s list of products not to use
Ammonia	No	On the NTMA’s list of products not to use
Degreasers	No	On the NTMA’s list; harsh on the matrix
All-purpose cleaners with salts, alkali or acids	No	NTMA warns they can harm the floor
Steam mop	Check first	Not covered by the NTMA guide; follow your sealer maker’s directions

The NTMA’s guide adds a technique note worth following: let the neutral cleaner sit on the floor for several minutes so it can loosen the dirt, then rinse with clean water, and do not let the solution dry on the surface. Change rinse water often, and dry with a cotton or microfiber cloth.

Reading a label in the store

A few words on a label tell you most of what you need:

Good signs: “pH neutral,” “neutral cleaner,” “safe for natural stone,” “for terrazzo,” “no rinse residue.”
Warning signs: “descaler,” “lime remover,” “rust remover,” “grout haze remover,” “efflorescence remover,” “tile and grout deep cleaner.” These are often acidic, built to dissolve mineral deposits, and acid is what etches cement terrazzo.
Also a warning: “shine,” “gloss restorer,” “floor finish,” “polish” on a liquid you mop on. Those are coatings, and they build up.
Concentrate strength: dilute as directed. A neutral cleaner used far too strong can leave a residue that dulls the floor, which is why the NTMA stresses rinsing with clean water.

If a label does not say what the pH is, assume it is not neutral and leave it on the shelf.

Sealers: what to use

Penetrating (impregnating) sealers soak into the pores of the cement matrix and leave the polished stone as the surface. The NTMA’s care guide says the Portland cement binder is the part of a cement terrazzo floor that benefits most from protection, and that sealers help stop spills from penetrating on contact. It also says water-based sealers are most commonly recommended and used today.

Topical coatings sit on top as a film: acrylic “terrazzo finishes,” urethane, floor wax and the shine-in-a-bottle products. We do not use them, for three reasons:

Slipperiness. The NTMA says purely surface waxes and all-purpose sealers can result in slippery surfaces.
Uneven wear. A film wears through in the traffic paths and stays shiny at the edges, so the floor looks patchy within a few years.
Moisture. On a Florida slab-on-grade floor, a film can trap vapor and turn cloudy. That matters more than ever after the floods of 2024. See salt and silt after flooding.

A care routine that works

Dust mop daily or close to it. The NTMA notes that tracked-in grit acts as an abrasive. A sandy Tampa yard sends a lot of it inside.
Damp mop weekly with water and a neutral cleaner, rinse, and dry.
Wipe spills fast, especially citrus, wine, coffee, soda and pet accidents. The NTMA says even standing water can eventually damage some sealers.
Mats at the doors, with backings that will not stain or trap moisture.
Strip and reseal when the sealer wears, rather than piling coats on.

When a product has already done damage

If someone has been mopping with vinegar, the floor is etched; if someone has been waxing it, it has buildup. Either way, cleaning will not fix it. A light hone and polish, typically $3 to $5 per square foot, takes etching out; old wax and coatings come off in a full grind at $5 to $9. See dull, etched spots.

Prices

Work	Typical
Professional resealing of a restored floor	$1.50 to $3 per sq ft
Light hone and polish before resealing	$3 to $5 per sq ft
Grinding off old wax or coatings	$5 to $9 per sq ft

These match the pricing page. The full maintenance routine and the water-drop test for when to reseal are on the sealing and maintenance page.

Frequently Asked Questions

What is the best cleaner for terrazzo floors?

A pH-neutral cleaner made for stone, diluted as the label says, with plain water for rinsing. The NTMA care guide says only neutral pH materials should be used when scrubbing or mopping terrazzo. Look for 'pH neutral' or 'stone safe' on the label.

Can I use a regular household floor cleaner or vinegar on terrazzo?

Check the label for the pH and avoid anything acidic, alkaline or full of solvents. The NTMA care guide says not to use degreasers, bleach, vinegar, ammonia or other household chemicals on terrazzo, and warns against all-purpose cleaners with harmful alkali or acids. Vinegar is the most common mistake; it etches the cement.

Should terrazzo be waxed?

No. The NTMA care guide says not to use purely surface waxes or all-purpose sealers, because they can make floors slippery. Wax also builds up, yellows and traps dirt, and eventually has to be stripped.

What kind of sealer goes on terrazzo?

A penetrating sealer that soaks into the cement matrix. The NTMA says water-based sealers are the ones most commonly recommended today. Professional resealing of a restored floor typically runs $1.50 to $3 per square foot.