Technical reference · GlassProtect on vitrified glaze
The chemistry of sealing glazed porcelain.
This is the specifier's version: how a sol-gel nano layer bonds to a vitrified porcelain glaze, the four resistances that decide real-world performance and the honest bounds on each, how it compares to a spray-on repellent, and the abrasion standards behind the durability numbers. GlassProtect is the one and only next-generation sol-gel surface protective coating in Australia, and here is precisely why that matters on a glaze.
At a glance
The coating, in spec.
GlassProtect is a transparent sol-gel nano layer engineered for vitreous surfaces. A porcelain glaze is exactly that: a fired, glassy silica surface, so it sits squarely in the product's optimal range.
Condenses covalently to the glaze's surface silanols on cure.
A conformal nano layer, not a film build. Optically clear at around 99 percent.
Hydrophobic. Benefit mechanism is shedding and roll-off, not a hero bead number.
Repels oil as well as water; an initial figure, never a retention claim.
Still beading above 100 degrees at 3,000 cream-cleanser scrub cycles.
On the coating's repellency function, sitting on top of Australian Consumer Law.
The bond
Why a glaze is the easy case.
A porcelain glaze is amorphous, vitrified silica. Like glass, its surface carries reactive silanol groups, and those are what the sol-gel grafts to. There is no carbonate problem here, no pore-versus-surface trade-off. It is the one class of surface where the covalent Si-O-Si bond forms cleanly and directly.
Sol, then gel, then bond
The sol cross-links into a dense Si-O-Si network and, on cure, condenses with the glaze's own surface silanols to form genuine covalent bonds continuous with the glassy surface. Chemical integration, not adhesion. The full mechanics of that bond, and why a vitreous surface is the one it forms on most cleanly, are the shared story: how glass coating actually works
Surface energy is the lever
The cured layer lowers the surface free energy of the glaze. Two independent numbers govern the benefit: the contact angle decides whether a droplet beads, and the sliding angle decides whether it rolls off. GlassProtect holds a durable low sliding angle, so water sheets and beads off with far less dwell. Fewer minerals are left behind, and the ones that are do not key in: they sit loosely on the surface instead of bonding to it, so a quick wipe clears them where an unsealed glaze would hold the spot.
The oleophobic half is what beats soap scum
Soap scum is calcium and magnesium stearate plus body oils: an oily film. A water-repellent-only surface still gets wetted and fouled by it. GlassProtect starts higher on oil as well, so the scum releases instead of keying onto the glaze. That is the mechanism a rain-repellent can't match.
The category has three ways to seal: a film on top, a sealer in the pores, or a layer bonded into the surface itself. On a vitrified glaze the third path is the direct one, the sol-gel condensing covalently to the surface silanols. The three, on one axis: the three ways to seal a surface, compared
The four resistances
What decides real-world performance.
A tile in service is not a lab coupon. It is mopped, scrubbed, walked on, hit with detergent, baked under UV and fouled with oil, and every one of those loads acts at the surface, where the coating lives. GlassProtect meets all four, each stated with its honest bound and never as immunity. The full breakdown of the four resistances, with the bounds and the standards behind them, is the shared science: the four real-world resistances
On a glaze the two loads that decide the job are abrasion and oil. Abrasion is the cream cleanser, the scrub pad and foot traffic: GlassProtect is still beading above 100 degrees at 3,000 cream-cleanser cycles, around 3× slower repellency loss than the leading brand, degrading by slow nano-scale wear with no cliff-edge and no strip to renew. Oil is the greasy soap-scum film that dulls a glazed floor and clouds a shower wall: it sits on the surface and lifts in cleaning rather than keying onto the glaze, starting around 84 degrees on oil. That 84-degree figure is initial-only, and we deliver it PFAS-free, without the fluoropolymer chemistry now being regulated out.
Head to head
Versus the spray-on repellent.
Glazed porcelain doesn't take an impregnator or a film, because the glaze isn't porous. The real alternative you'll be offered is a consumer spray-on repellent. The wedge is location and durability, not a magic molecule.
GlassProtect
- Condenses a covalent Si-O-Si nano layer to the glaze's own silanols on cure. It is part of the surface, not sitting on it.
- Repels oil as well as water, so it sheds the oily soap scum and greasy film a water-only repellent can't.
- Tested 3× more durable than the leading brand; still beading at 3,000 cream-cleanser cycles.
- Renews with a top-up on a clean surface. No stripping, no cliff-edge failure.
- Registered under a 10-year guarantee on the repellency function.
A consumer spray-on repellent
- Typically a thin hydrophobic-only layer that sits on the glaze and is stripped by the first few real cleaning cycles.
- Repels water but not the oily scum, so a tiled shower still fogs and a floor still hazes.
- No abrasion durability data; the beading you can see is the first thing to disappear.
- Reapplied blind, on hope, with no test and no registration.
- No guarantee, no remedy, no record of the job.
Judge a coating on the layer you actually use. The surface is where a tile is cleaned and walked on, and that is where GlassProtect protects and renews.
Honest limits & the standards
Where it stops, and how it's measured.
The candour is the credibility. Here is what the coating does not do, and the recognised methods the durability is read against.
- It is not a mechanical barrier. At a nano-thin layer it changes surface energy, not hardness. Dragged grit and furniture still mark a glaze. We make no hardness or armour claim of any kind.
- You are not buying a surface that never needs a wipe. The hard part is done: minerals and soap scum can no longer bond, so keeping the glaze clear goes from a razor blade and a bottle of acid to a single wipe. Constant hard, bore or reticulation water left to dry can still leave spots, on any surface on earth, but on a coated glaze those spots wipe away, where on an unsealed glaze they bond on and etch in for good. A wipe is all it ever takes.
- Beading fades before the shed-and-wipe performance does. The contact angle is a fragile probe of the top nanometre or so; loss of beading is a prompt to re-test on a freshly cleaned patch, not proof of failure. Contamination alone can suppress the bead on a still-good coating.
- Chemical stability is bounded. The Si-O-Si network is more resistant than an organic coating, not immune. It holds at routine cleaning pH and short contact; hydrofluoric acid attacks silica directly, and strong alkali left to dwell will hydrolyse it.
- Oil-repellency is initial-only across the whole non-fluorinated category. The 84-degree oil figure describes day one, not year three, and neither GlassProtect nor any fluorine-free chemistry matches fluoropolymer oil-repellency, which is itself exiting via PFAS regulation.
- The grout is a separate substrate. Cementitious grout is porous mineral and takes MineralProtect, our sol-gel for stone and concrete, not the glass-family coating. The floor is sealed as a system, each surface with the right chemistry.
Film-thickness loss over scrub cycles; the class of method behind the 3,000-cycle retention.
Standard scrub-cycle durability measurement.
Advancing angle (C813) and the purpose-built method for sub-100 nm coatings on glass (D8380). Don't conflate the two.
REACH-compliant is a chemical-registration status, not a PFAS-free claim in itself.
Go deeper
The shared science lives in the pillars.
This page is the glaze-specific delta. The mechanism, the four resistances and the three ways to seal are covered in full in the pillars below.
Pillar · the glass mechanism
How glass coating actually works
The Si-O-Si bond to a vitreous surface, and the spotting, scum and etching story in full. Read the pillar
Pillar · durability
The four real-world resistances
Why protection lives at the surface, and each of the four loads with its honest bound. Read the pillar
Pillar · the three ways
The three ways to seal, compared
A film on top, a sealer in the pores, or a layer bonded into the surface itself, side by side. Read the pillar
The plain-English guide
Sealing glazed porcelain tile
The same story without the chemistry: the problem, the fix, the proof and the honest limits. Read the guide
Same family
Polished / lappato porcelain
A polished face that shows every smear. Read the guide
Browse everything
The Sealing Library
Every common hard surface in WA, honestly graded. Find your surface
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