Frameless glass · the technical read
The science, in full.
Glass is the cleanest case in surface protection: one truly silanol-rich substrate, one approved etch-prevention claim, and the clearest head-to-head we have. This is the detail behind the plain-English guide, for specifiers, builders and anyone who wants the whole picture before they commit.
GlassProtect, at a glance
The coating on glass.
Every figure above is a starting-point property on sound glass. The oil angle is an initial value, and the beading eases over service life. None of this is stated as a permanent or a proof claim, because it isn't one.
The bond
Why glass is the clean case.
Glass is amorphous silica. Its surface is dense with reactive silanol groups, the exact chemistry our sol-gel is designed to grip, with none of the complications you get on carbonate stone. That's why glass is where the mechanism is at its simplest and its strongest. The shared story, how a bonded sol-gel beats a film on top and why it holds where a rinse-off repellent fails, lives in how glass coating works. Here we stay on what is specific to glass.
Condensation, not adhesion
The sol arrives silanol-rich and condenses with the glass's own surface silanols into a continuous silica network, a Si-O-Si layer chemically integrated with the glass rather than laid on top of it. It is the same family of bond that holds the glass together in the first place, which is why it doesn't peel like a film.
Surface energy is the real lever
Lowering the glass's surface energy is what does the work. Two numbers govern it: contact angle decides whether a drop beads, sliding angle decides whether it rolls off before it evaporates in place. A surface can bead beautifully and still be sticky, so the durable low sliding angle is the under-used edge here: droplets leave before they dry, so fewer minerals are ever left behind.
Oleophobicity is what beats soap scum
Soap scum is insoluble calcium and magnesium stearate plus body oils: an oily film, not a mineral one. A water-repellent-only surface still gets wetted and fouled by it. GlassProtect starts higher on oil, around 84 degrees, so the scum sits on top and lifts in cleaning. That oil angle is an initial property and fades first, which is why we frame it as repels oil, not just water, and never as a durable or head-to-head oil figure.
Etch prevention, the one approved case
Glass etching is real material loss: ion exchange, then hydroxide attack above roughly pH 9 that dissolves the silica network. It is correctable only by abrasion, not cleaning. By keeping mineral-laden water from dwelling on the glass, the coating protects against that permanent etching. Glass is the single substrate where we make an etch-prevention claim, precisely because the failure mechanism is dwell-driven and the coating interrupts it.
The resistance that decides glass
On glass, it comes down to the cleaning.
A sealed surface faces four loads: cleaning and abrasion, chemistry, UV and oil. How a bonded inorganic layer meets each, with the honest bound on every one, is the shared story, and it lives in the four real-world resistances. On glass, the load that decides everything is cleaning and abrasion, because a shower screen lives under the cream cleanser, the scrub pad and the squeegee. So that is the one we measure hardest.
Cleaning & abrasion, on glass
The load-bearing resistance
Durability here is contact-angle retention under wet-scrub and abrasion, measured against recognised methods including ISO 11998 wet-scrub, ASTM D2486, and the glass-specific ASTM C813 and ASTM D8380 for sub-100 nm coatings. GlassProtect is still beading above 100 degrees at 3,000 cream-cleanser cycles, around 3 times slower repellency loss than the leading brand. It is not scratch-proof or abrasion-proof: it degrades by slow nano-abrasion and eventually eases back toward untreated, then tops up on clean glass without stripping. Chemistry, UV and oil each carry their own honest bound, and the oil one matters most here, because soap scum is oily and a water-only surface never sheds it. The full four-load picture, with the bounds, is in the pillar above.
Against the alternatives
A bonded layer, not a rinse-off film.
On glass there are really two alternatives: leave it bare, or lay on a thin consumer rain-repellent that wears off in weeks under normal cleaning. Both lose to a bonded sol-gel for one reason. A bonded nano layer stays put through the cleaning and repels oil as well as water, so it sheds the oily soap scum that actually clouds shower glass, where a rinse-off film sheds away first and never touches the scum at all. GlassProtect is also the one and only next-generation sol-gel surface protective coating in Australia: nothing else on the market works like this. The full side-by-side across every class of sealer is in sealer types compared, and the plain-English glass version is in how glass coating works.
The evidence
Measured the way glass gets used.
Durability on glass is a retention curve, not a single day-one number. The recognised way to measure it is contact-angle retention across wet-scrub and abrasion cycles, which is exactly the cream-cleanser-and-pad attack a real shower gets. Do note that advancing and static contact-angle figures come from different standards and shouldn't be read against each other.
- Wet-scrub and abrasion standards: ISO 11998, ASTM D2486, and the glass-specific ASTM C813 and ASTM D8380 for sub-100 nm coatings.
- Retention result: still beading above 100 degrees at 3,000 cream-cleanser cycles, around 3 times more durable than the leading brand.
- Independent testing: houses including TÜV Rheinland, SGS, Intertek and REACH. PFAS-free by design, not by reformulation.
The honest bounds, in one place
What we won't claim.
Not permanent, not maintenance-free
The hard part is done. GlassProtect turns keeping your glass clear from a job with a razor blade and a bottle of acid into a quick wipe or squeegee, because minerals and soap scum can no longer bond to the surface. Constant hard, bore or reticulation water with no upkeep can still leave spots, on any glass on earth, but on a coated screen those spots wipe away, where on bare glass they bond on and etch in for good. It fades slowly and tops up on clean glass. You are not buying glass that never needs a wipe. You are buying glass where a wipe is all it ever takes. The generic upkeep story, the two clocks and how a top-up works without stripping, is in living with a sealed surface.
It can't reverse existing etching
Etching is material already lost from the glass. No coating restores it. The coating protects sound glass by cutting the dwell time that drives etching in the first place.
The oil angle is initial-only
Oil repellency fades before water repellency across the whole category, ours included. We state it as an outcome, repels oil as well as water, and never as a durable or brand-to-brand oil number.
Durability is architectural, not a hardness number
The edge comes from a dense bonded network in the right place, not from a hardness rating. It degrades by slow nano-abrasion with no cliff-edge and no strip to renew. It is not scratch-proof.
Technical questions
The detail answered.
What actually bonds the coating to glass?
Glass is amorphous silica with a surface rich in silanol groups. The sol-gel condenses with those silanols to form a continuous Si-O-Si silica network chemically integrated with the glass, rather than a film adhered on top. That's why it stays put through cleaning where a rinse-off repellent doesn't.
How is the durability measured?
As contact-angle retention across recognised wet-scrub and abrasion standards, including ISO 11998, ASTM D2486, and the glass-specific ASTM C813 and ASTM D8380. The headline result is still beading above 100 degrees at 3,000 cream-cleanser cycles. Note that advancing and static contact-angle figures come from different standards and shouldn't be compared directly.
Why does it beat a water-repellent-only product?
Because the failure that clouds shower glass is oily soap scum, insoluble calcium and magnesium stearate plus body oils. A water-repellent-only surface still gets wetted and fouled by an oily film. GlassProtect starts higher on oil, so the scum lifts in cleaning instead of clinging.
How does sealing protect against etching if a coating can't stop chemistry?
Etching is driven by mineral-laden water dwelling on the glass long enough to leach and then dissolve the surface. The coating keeps water rolling off before it evaporates in place, so it cuts the dwell time that drives etching. Glass is the one substrate where we make an etch-prevention claim, because the mechanism is dwell-driven and the coating interrupts it. It won't reverse etching that has already occurred.
Does sealed glass still need any upkeep?
Yes, and here is the honest version. The hard part is done: GlassProtect turns keeping your glass clear from a job with a razor blade and a bottle of acid into a quick wipe or squeegee, because minerals and soap scum can no longer bond to the surface. Constant hard, bore or reticulation water left with no upkeep can still leave spots, on any glass on earth, but on a coated screen those spots wipe away, where on bare glass they bond on and etch in for good. You are not buying glass that never needs a wipe. You are buying glass where a wipe is all it ever takes.
Is it PFAS-free, given it repels oil?
Yes. The oil-repelling coatings that came before were fluoropolymer, which is PFAS and is being regulated out. GlassProtect delivers oil repellency without fluorine, PFAS-free by design rather than by reformulation. The oil repellency is an initial property and doesn't match fluoropolymer performance, which we state plainly.
Go deeper
Into the science, not sideways.
Pillar
How glass coating works
The three ways glass fails, spotting, soap scum and etching, and exactly what the coating changes about each. The shared glass science in one place.
Read the pillarPillar
The four real-world resistances
Cleaning, chemical, UV and oil, each with its honest bound, and why protection has to live at the surface where the wear lands.
Read the pillarPillar
Living with a sealed surface
The two clocks, why the beading fades before the protection, and how a top-up renews without stripping. The honest upkeep deal.
Read the pillarThe plain-English guide
Sealing frameless glass in Perth
The same story without the chemistry: what goes wrong, how we fix it, and what it costs.
Read the plain versionSame coating, other glass
Windows & glazing
The same GlassProtect coating on house windows and glazing that spot with reticulation over-spray and hard-water rain.
Read the guideFind your surface
The Sealing Library
Every surface we seal, graded honestly by how well the coating protects it.
Browse the libraryGet a quote
Specify it once. Seal it right.
We'll clean and coat your frameless glass with GlassProtect, applied to spec by a certified applicator and registered under a 10-year guarantee. Confirmed price before you book.