Glaco Australia | Every Glaco Compared | Alpha Details Melbourne
The rain repellent Australia keeps searching for, explained properly
Glaco is Soft99's family of rain-repellent glass coatings — on sale in Japan since 1991, and by Soft99's own account the reason a beaded windscreen became a normal thing to want. Alpha Details is an authorised Australian Soft99 stockist and carries every Glaco product available in the Australian market: Ultra Glaco, Glaco DX, all three sizes of the sponge-ball Roll On, Glaco Blave, Mirror Coat Zero, and the Glass Compound prep that makes all of them last. This page is the short course in what each one is, which one to buy, and why they sometimes fail — written by a chemist, not copied off the box.
What Glaco actually is
Glaco is not a wiper additive and it does not treat the water — it coats the glass. Automotive glass is a silicate network, and its surface is naturally water-loving: rain wets out across it in a sheet, which is exactly what you do not want in front of your eyes at 100 km/h. Glaco's active is a silicone polymer that bonds to that silicate surface and presents a water-repelling face outward. The surface energy of the glass drops, water can no longer spread, and it pulls itself into beads instead.
The number that describes this is the water contact angle — the angle a droplet makes where it meets the surface. Untreated glass sits low, water spreading almost flat. Glaco Roll On lifts it to around 105°; Ultra Glaco reaches 110–120°. Past roughly 90° a droplet stands proud of the surface, and at driving speed the airflow alone carries it up and off the glass. Above about 60–80 km/h a Glaco-treated windscreen largely wipes itself.
Which Glaco should you buy?
Every product in the family does the same job. What separates them is how long they last and how long they take to apply — pick the trade-off that suits you.
Ultra Glaco — the flagship. The strongest and longest-lived of the family: 110–120° contact angle and around twelve months per application, by Soft99's own figures. The liquid formulation wants a careful, even wipe and a proper cure, so it is the slowest to apply — but you do it once a year. If you buy one Glaco, buy this one.
Glaco DX — the forgiving middle. Around six months of durability with Soft99's S.A.R.F. self-levelling additive, which evens out an imperfect wipe as it cures. The streak-free choice for a first-timer, and the one we point people to when they are nervous about application.
Glaco Roll On — the original sponge-ball. The applicator that made DIY glass coating mainstream: press the sponge ball to the glass and the active liquid dispenses through it. Fastest and cleanest application in the family — nothing on your hands, nothing to drip — at around four months per coat. Also in Large (120ml) and MAX (130ml) for bigger glass or repeat treatments.
Glaco Blave — the wash-and-coat hybrid. Lays the hydrophobic layer down during the wash rather than as a separate step afterwards. The lowest-effort way to keep an existing Glaco layer topped up.
Glaco Mirror Coat Zero — for the surfaces a windscreen product handles badly. Formulated for side mirrors and reversing-camera lenses, the small convex surfaces where a heavy windscreen coating goes on unevenly. In Melbourne winter traffic, a mirror you can actually see out of is not a small thing.
Why Glaco "didn't last" — it is almost always the prep
Every Glaco bonds to bare glass. Old wax overspray, silicone residue from previous dressings, and the mineral film left by evaporated water spots all sit between the coating and the silicate it needs to anchor to. Apply Glaco over that layer and it bonds to the contamination, not the glass — and it fails in weeks. This is the single most common reason people report a Glaco not lasting, and it is not the coating's fault.
The fix is in the same family. Glaco Glass Compound Roll On is the pre-treatment: it strips water spots, dead coating residue and surface contamination back to bare glass with the same sponge-ball applicator, and the coating you apply afterwards bonds the way the chemistry intends. For heavier mineral etching, Glass Stain Cleaner uses a mild cerium-oxide abrasive — the same compound used commercially to polish optical glass. Strip first, then coat. It is one extra step, and it is the difference between four months and four weeks.
What we will not claim about Glaco
Alpha Details is run by a chemist who will not publish a claim he cannot source, so three things belong here in plain words.
The durability figures are Soft99's own. Twelve months on Ultra Glaco, six on DX, four on Roll On — these are manufacturer figures measured in Japan, not independent Australian testing. Australian UV, long commutes and hard wiper use all pull against a coating. Treat the numbers as the honest upper end of well-maintained use, not a warranty.
The Glaco Wiper range is not available in Australia. Soft99 make wiper blades designed to preserve a Glaco layer rather than scrape it off. All nine of those SKUs are unavailable in this market and we do not expect them back, so we do not list them. Your existing wipers work fine over Glaco — the coating outlives the rubber.
Rain Drop and Tornado Vortex are not Glaco. They are a different Soft99 chemistry (the G-RAS shield) that coats body and glass in one pass — around five months of gloss and beading on paint and roughly three months of rain repellence on glass. Genuinely useful, but a different tool. Several stores file them under Glaco; they are not, and the distinction matters if you are buying for the windscreen specifically.
Frequently asked questions — Glaco in Australia
Where can I buy Glaco in Australia?
Here. Alpha Details carries every Glaco product available in the Australian market, stocked in Melbourne and shipped Australia-wide, free over A$95, with same or next business day dispatch on in-stock lines.
Which Glaco lasts the longest?
Ultra Glaco — around twelve months per application by Soft99's figures, with the highest contact angle in the family at 110–120°. Glaco DX sits around six months and the Roll On family around four.
Why did my Glaco stop beading after a few weeks?
Almost always contamination under the coating. Glaco bonds to bare silicate glass; wax residue, silicone dressing overspray or a water-spot film blocks that bond and the layer fails early. Strip the glass with Glaco Glass Compound Roll On first, then re-coat.
Can I use my wipers over Glaco?
Yes. The coating sits within the glass surface chemistry rather than as a soft film, and normal wiper use is part of its rated life. Soft99's dedicated Glaco Wiper blades are not sold in Australia, and you do not need them.
Is Glaco a ceramic coating for glass?
No — Glaco is a silicone-polymer repellent, not a silica ceramic. That is a feature: it applies in minutes, and when it eventually wears it strips and re-applies cleanly rather than needing machine polishing to remove.
What is the difference between Glaco and Fusso Coat?
Glaco is the glass line; Fusso Coat is the paint line — a fluoropolymer (PTFE) sealant for clearcoat. Same company, different chemistry, different surfaces. The full story is on our Soft99 Australia page.
Buy Glaco in Australia
The whole family is stocked and shipping from our Heidelberg West, Melbourne studio — free delivery over A$95.
Want the wider story of the company behind it — the 1954 Osaka wax house, the vending machines, the Tokyo Stock Exchange listing? It is in our Soft99 brand piece and on the Soft99 Australia page. Not sure which Glaco suits your car? Ask us — that conversation is free.