Technical reference · MineralProtect on quartzite
Quartzite, at the level of the bond.
The plain-English version is on the quartzite guide. This is for specifiers and builders: what is specific to quartzite, why it is one of our best-anchored stones, and the one identity question that decides everything on it. The shared science, the sol-gel mechanism, the mineral families and the four resistances, lives in the pillars, linked as we go.
At a glance
MineralProtect on quartzite.
Quartzite is a metamorphosed sandstone, effectively interlocked quartz: siliceous, hard and broadly acid-resistant, but porous. That petrology makes it close to an ideal substrate for our chemistry.
A cross-linked Si-O-Si network, water-based, not an organic film.
Engineers the surface, not the pore, where wear and cleaning happen.
Condenses with the stone's own silanols on cure. Integration, not adhesion.
Changes surface energy only. Same colour, finish and feel.
Doesn't cap the pore, so the stone keeps releasing moisture.
Delivers oil resistance without fluorine, not by reformulation.
Degrades slowly by nano-abrasion. No cliff-edge, no cure-and-strip.
On the repellency function, backed by JUMBOGUARD, over your ACL rights.
The mechanism, in brief
Why quartzite is the easy case.
MineralProtect is the one and only next-generation sol-gel surface protective coating in Australia, and quartzite is close to its ideal substrate. Quartzite is metamorphosed sandstone, effectively interlocked quartz, so its surface is dense in the reactive silica sites a sol-gel bonds to. On cure it condenses into the stone to form a genuine covalent Si-O-Si bond, continuous with the mineral: chemical integration, not a film stuck on top. It is the same bond it makes on granite and sandstone. The full mechanism, the mineral families and the four resistances live in the pillars, summarised here and linked to go deeper.
The bond
A covalent anchor
Quartzite shares its silica chemistry with glass and quartz, which is why it is one of our best-anchored stones. The full siliceous versus carbonate story is in stone and sealer chemistry.
The location
At the surface
The network cures roughly 90 to 100 nanometres thin, at the face where cleaning and wear act, not stranded down the pore. Why that beats a film or a pore sealer is in how sealing works.
The wear
How it holds up
Cleaning, chemical, UV and oil all land at the surface, and that is where the network sits, stated as resistance, never immunity. The four resistances with their honest bounds are in surface resistance.
What is specific to quartzite
First, is it actually quartzite?
This is the one question that changes everything on quartzite, and it is where most of the honest work happens. True quartzite is siliceous, hard and broadly acid-resistant. But a large share of slab sold as quartzite is a softer dolomitic marble, a carbonate that etches. Same name on the invoice, different mineral, very different outcome from a seal. We identify what you actually have before we quote.
True quartzite
Siliceous and hard
Interlocked quartz. It will not fizz or dull under a dilute acid, and a steel blade will not scratch it. This is the substrate our chemistry bonds to covalently, and it takes protection superbly on benchtops, island tops, pool coping and paving.
Sold as quartzite, actually carbonate
Dolomitic marble
Softer, a calcium and magnesium carbonate. It reacts slowly to acid and a blade marks it. Sealing still slows absorption, but it cannot stop acid etching, because etching is the acid dissolving the stone itself. On this stone we tell you straight what a seal can and cannot do.
Why we test on site: it changes what sealing can honestly promise. Get the identity right and the coating, the prep and the expectation all follow. This is the same siliceous versus carbonate split that runs under every stone, laid out in stone and sealer chemistry.
On the record
The limits, stated plainly.
- It does not stop acid etching. Etching is the acid dissolving the stone itself, so no penetrating sealer prevents it. True quartzite is siliceous and broadly acid-resistant; the stone that etches is the dolomitic marble sold under the same name, which is why we confirm the stone first. The one substrate where we can claim etch prevention is glass.
- It is not permanent or maintenance-free. A coat performs for years and fades slowly, and the surface repellency eases off before the coating is fully gone, so loss of beading is a prompt to re-test, not proof of failure. It reduces cleaning effort and frequency; it doesn't remove it.
- Chemical stability is bounded. More resistant, not immune. It is built for the routine alkaline cleaning and pool chemistry of real maintenance, not for prolonged contact with strong acids or alkalis.
- Oil resistance is by surface energy, not fluorine. It makes oil sit up and lift in cleaning. It does not match the raw oil-repellency of the fluoropolymer sealers, which are being restricted out under Australia's PFAS regulation.
Technical questions
For the people who ask how.
How do I know if my slab is true quartzite or a dolomitic marble?
The field test is simple: quartzite is siliceous and won't fizz or etch with a dilute acid, while a dolomitic marble sold as quartzite will slowly react and dull. Hardness helps too: true quartzite won't be scratched by a steel blade, whereas softer stone will. We confirm it on site, because it changes what sealing can honestly do for the stone. If it's calcareous, sealing still slows absorption but it cannot stop etching.
Why does a sol-gel bond so well to quartzite specifically?
Because quartzite is essentially interlocked quartz, its surface is rich in silanol groups. Our sol carries its own silanols, and on cure the two condense into Si-O-Si bonds that are continuous with the stone. That's a genuine covalent bond, the same class of chemistry that holds glass and quartz together, rather than a coating merely stuck to the surface.
What about the durability figures I've seen, like 3,000 scrub cycles?
That figure and the tested durability multiple belong to GlassProtect on glass, measured by an ISO 11998 class method, and we keep them to glass rather than transferring them to stone. On quartzite, the durability claim is architectural: a dense inorganic network at the surface that degrades by slow nano-abrasion and renews by top-up. We cite the standards and the mechanism, not a stone-specific cycle count we can't substantiate.
Will it change the slip characteristics of quartzite paving?
It's a colourless conformal layer that changes surface energy, not a film that lays a smooth membrane over the texture, so it doesn't slick the surface the way a topical coating can. We keep any slip discussion comparative to a film only, and we don't publish a slip rating: for a rated surface, that's a matter for on-site testing.
Go deeper
The science behind the bond.
The shared chemistry lives in the pillars. Follow them for the full mechanism, the mineral families and how a seal holds up in real use.
Pillar · the chemistry
Stone & sealer chemistry
Siliceous versus carbonate, and why the mineral family of your stone decides how a coating holds. Go deeper →
Pillar · the mechanism
How sealing works
The sol-gel, and the third class that bonds at the surface instead of filming on top or hiding in the pore. Go deeper →
Pillar · the wear
Surface resistance
The four real-world resistances, cleaning, chemical, UV and oil, each with its honest bounds. Go deeper →
Plain English
Sealing quartzite
The straightforward guide to sealing quartzite benchtops, paving and pool coping. Read it →
Same family
Granite
The other siliceous benchtop stone, with the same covalent bond and colourless finish. Read the guide →
Browse
The Sealing Library
Every common WA surface, by material, honestly graded on fit. Find your surface →
Get a quote
Specify it with confidence.
We'll assess the stone, confirm what it is, and seal it to spec with MineralProtect, registered under a 10-year guarantee. Safety data sheets on request.