Neutral cleaner
A near-neutral surfactant cleaner. The recommended answer for natural stone of every kind, and the least interesting product in the cupboard for good reasons.
In detail
A neutral cleaner is a surfactant-based product formulated to sit close to pH 7, so that it removes soil by surfactancy alone without acting chemically on the surface underneath. It has no descaling power, no saponifying power and no bleaching power, and that absence is precisely what it is for. The stone trade's recommendation for cleaning natural stone is a neutral cleaner, a stone soap, or a mild liquid washing-up detergent in warm water — and it gives the same recommendation for acid-sensitive calcareous stone and acid-resistant siliceous stone alike. That single fact resolves most of the anxiety around stone care: the question of whether a particular worktop tolerates acids does not have to be answered, because the recommended product is the same either way. The general lesson transfers. Where a surface's tolerances are unknown, a neutral surfactant cleaner is the option that makes the fewest assumptions, and reaching past it for an acid, an alkali or a bleach means deliberately choosing a product that acts on the surface as well as on the dirt.
Properties
- pH
- Approximately neutral
What works
Neutral cleaner is effective against Grease Supported
Neutral cleaner is safe on, in specific conditions, Polished marble
Safe only in specific conditions
This is only appropriate within specific limits. Outside those limits, no claim is made.
Only within these limits:
- A neutral cleaner, stone soap, or mild washing-up detergent in warm water
- No acidic or alkaline additive of any kind
- Test an inconspicuous area first on any stone whose finish is unknown
The stone trade gives the same recommendation for acid-sensitive and acid-resistant stone alike, which means the compatibility question does not have to be resolved before cleaning.
Precautions
- Test on an inconspicuous area first
Evidence
Supported
Sources
Care & Cleaning of Natural Stone
Natural Stone Institute · Trade or professional body
Relied on for: That stone surfaces are cleaned with a neutral cleaner, stone soap, or a mild liquid dishwashing detergent and warm water. (states this directly)
Neutral cleaner is safe on, in specific conditions, Limestone
Safe only in specific conditions
This is only appropriate within specific limits. Outside those limits, no claim is made.
Only within these limits:
- A neutral cleaner, stone soap, or mild washing-up detergent in warm water
- No abrasive, because limestone is softer than marble
- Deal with spills promptly: limestone is more porous and absorbs faster
Precautions
- Test on an inconspicuous area first
Evidence
Supported
Sources
Care & Cleaning of Natural Stone
Natural Stone Institute · Trade or professional body
Relied on for: That mild non-acidic cleaners are recommended for calcareous stone, specifically a neutral cleaner, stone soap or mild dishwashing detergent in warm water. (states this directly)
Neutral cleaner is safe on, in specific conditions, Granite
Safe only in specific conditions
This is only appropriate within specific limits. Outside those limits, no claim is made.
Only within these limits:
- A neutral cleaner, stone soap, or mild washing-up detergent in warm water
- Nothing acidic, regardless of the stone's own acid tolerance, because the impregnating treatment is not the stone
Precautions
- Test on an inconspicuous area first
Evidence
Supported
Sources
Care & Cleaning of Natural Stone
Natural Stone Institute · Trade or professional body
Relied on for: That stone surfaces including siliceous stone are cleaned with a neutral cleaner, stone soap or mild dishwashing detergent in warm water. (states this directly)
Neutral cleaner is safe on, in specific conditions, Dashboard and interior trim
Safe only in specific conditions
This is only appropriate within specific limits. Outside those limits, no claim is made.
Only within these limits:
- A mild, NEUTRAL-pH cleaner. Not a laundry detergent and not a washing-up liquid with a degreaser in it
- Sprayed onto the cloth, never onto the panel
- A SOFT bristle brush for crevices — never a stiff one, and never one previously used with a harsh chemical
- Wipe the excess off. Too much soap leaves a residue that streaks and attracts dirt
Test an inconspicuous area first. The maker gives the tell: colour transfer onto the cloth, or any change in appearance, means chemical attack and the product must not be used.
Precautions
- Test on an inconspicuous area first
Evidence
Strongly supported
Sources
General Motors LLC, published via NHTSA · Manufacturer documentation
Relied on for: That only mild neutral-pH cleaners are used, that laundry detergents and dishwashing soaps with degreasers are avoided, that too much soap leaves residue that streaks and attracts dirt, that cleaner is sprayed onto a clean towel and worked with a soft bristle brush, and that stiff brushes are never used. (states this directly)
Why
- Neutral cleaner is explained by Surfactancy
Hacks and claims involving this
- Natural cleaning products are safer Does not work
When the obvious answer is wrong
How do I remove limescale from a marble shower without ruining the marble?
Marble is also calcium carbonate. The acid cannot distinguish between carbonate deposited by hard water and carbonate that is the stone itself, so it dissolves both. The result on the stone is etching: a dull, slightly rough patch where the polished surface has been chemically removed. It is not a stain and there is nothing left on the surface to clean off.
A different kind of treatment works: Take the mechanical route rather than the chemical one. The stone trade's stated treatment for surface accumulation of hard water — what it calls water spots and rings — is to buff with dry 0000 steel wool, which is fine enough to lift the mineral film without cutting the stone, and involves no acid at all. Work on the deposit only, keep it dry, and stop as soon as the film has gone. Prevention does more than any treatment here: a squeegee after each use removes the water before it can evaporate and leave its minerals behind, which is the moment the deposit is actually created. If the surface is already dull in patches rather than filmed, that is etching rather than scale, no cleaning method will touch it, and re-polishing is a job for a stone restorer.
Can I use a limescale remover on my bathroom taps?
The visible part of a modern tap is a plated, physical-vapour-deposited or powder-coated finish a few microns thick, not solid metal. The manufacturer's care sheet states that PVD finishes must not meet cleaners containing ammonia, bleach or acid, which excludes most limescale removers and a good share of bathroom sprays. Because the finish is microns thick there is no margin: material lost is coating lost, the dulling is progressive, and it cannot be polished back because there is nothing underneath to polish.
A different kind of treatment works: Prevent the deposit instead of dissolving it. The same care sheet gives the mechanism and the method in one line: allowing water to evaporate on metal will form water deposits, so blot the fitting dry with a dabbing action rather than rubbing, after use. That removes the water before it can leave anything behind, which is the only point at which the deposit is actually created. For routine cleaning, rinse away soap traces and dry with a soft cloth. Establish which finish you have before using anything else — the exception is instructive, since matte black and other powder coats are the one family the manufacturer permits a fifty-fifty water and vinegar solution on, so the finish that looks most fragile is the one that tolerates the household remedy.
Sources for this page
Sources
Care & Cleaning of Natural Stone
Natural Stone Institute · Trade or professional body
Relied on for: That stone surfaces are cleaned with a neutral cleaner, stone soap, or a mild liquid dishwashing detergent and warm water. (states this directly)