SOFT99 Glaco Guide: 3 Japanese Windshield Coatings That Keep Your View Clear in Heavy Rain

Last updated: July 2026

When the downpour hits faster than your wipers can work

Every driver in the Philippines knows the moment: a sudden downpour turns the road into a blur, and your wipers are fighting a losing battle. Visibility here is not a comfort feature — it is safety.

This is the problem Glaco was made for. SOFT99 is Japan's go-to car care and coating brand, and Glaco is its line of water-repellent glass coatings: rain beads up and rolls off your windshield instead of smearing across it.

Three Glaco options cover almost every driver. Here is what separates them, and how to pick the right one for your car.

How a water-repellent glass coating works

A water-repellent (hydrophobic) coating is a thin layer applied to glass that stops water from spreading into a film. Instead, rain forms beads that roll off the glass with airflow once you are moving — so you see the road, not the water.

One thing to know before you start: most coatings need clean glass to bond properly. Oil film left on the windshield is the usual reason a coating underperforms — which is exactly the step one of the picks below removes from your to-do list.

How we picked these three

We chose by the way people actually apply them: one that does cleaning and coating in a single pass, one built for the longest wear, and one sized for wide windshields. All three are genuine SOFT99 products shipped direct from Japan.

Glaco Q Rain Repellent 70ml — clean and coat in one wipe

Glaco Q is the shortcut. It removes oil film and lays down the water-repellent coating in the same application, so you skip the separate pre-cleaning step that other coatings require.

The bottle is the other half of the appeal: a rounded, mouse-shaped body with a wide felt applicator head, designed so you can cover a full windshield in one pass without your hand cramping. Rinse off loose dirt, shake with the cap on, apply to the glass, wait 5–10 minutes, then wipe clean with a well-wrung damp cloth.

Best for: first-timers and anyone short on time — the fastest route from bare glass to beading rain.

[[product:soft99-glaco-q-rain-repellent-70ml-1689]]

Glaco Ultra 70ml — the long-lasting coating

Glaco Ultra is the endurance pick. It uses a fluorine resin polymer that chemically bonds to the glass rather than just sitting on top of it, forming a durable hydrophobic film that repels rain, dirt, and road grime.

Application is the classic three steps: clean and dry the glass thoroughly, apply evenly with the applicator, let it dry, then buff off the residue with a clean dry cloth. Because it bonds chemically, prepping the glass properly really pays off here.

Best for: daily drivers who would rather apply once and go as long as possible before reapplying — and who do not mind the extra cleaning step.

[[product:soft99-soft99-glaco-water-repellent-set-super-glas-5654]]

Glaco Nurinuri Deka-Maru 120ml — built for big glass

Deka-Maru means “big round” in Japanese, and that describes the applicator: an oversized head that covers a wide windshield far faster than a standard bottle, paired with the largest formula volume of the three.

Clean and dry the windshield, apply evenly with the large head, let it dry, then wipe away any haze. It works on side windows too, so you can treat the whole car in one session.

Best for: SUVs, vans, and MPVs — or anyone treating more than one car and tired of small applicators.

[[product:soft99-soft99-glaco-water-repellent-set-super-glas-7885]]

Which Glaco should you buy?

Product	Volume	Removes oil film?	Applicator	Best For
Glaco Q Rain Repellent	70ml	Yes — same step as coating	Mouse-shaped felt head	Fastest all-in-one job
Glaco Ultra	70ml	No — clean glass first	Standard applicator	Longest-lasting protection
Glaco Nurinuri Deka-Maru	120ml	No — clean glass first	Extra-large head	Wide windshields, SUVs and vans

Application tips for tropical conditions

Work on clean, dry glass in the shade or a covered garage. In high humidity, give the windshield extra time to dry fully before you start — moisture trapped under a coating is the fastest way to a patchy finish.

Coating life depends on your driving and the weather, and a season of daily downpours works a coating hard. When beading starts to look lazy, that is your cue to reapply.

FAQ

What is Glaco? Glaco is SOFT99's line of water-repellent glass coatings from Japan that make rain bead and roll off automotive glass for clearer wet-weather visibility.

Which Glaco does not need a separate cleaner? Glaco Q Rain Repellent — it removes oil film and applies the water-repellent coating in the same wipe.

Which Glaco lasts longest? Glaco Ultra, which uses a fluorine resin polymer that chemically bonds to the glass for a durable hydrophobic layer.

Can I use Glaco on side and rear windows? Yes. Glaco coatings are made for automotive exterior glass, including side and rear windows.

How long do I wait before wiping Glaco Q off? Wait 5–10 minutes after applying, then wipe the glass clean with a well-wrung damp cloth.

Do I need to reapply after washing the car? Reapply when the water-beading effect begins to weaken — how quickly that happens depends on driving and weather conditions.

Drive into the rainy season prepared

Clear glass is the cheapest safety upgrade your car can get. Browse more Japanese household and car essentials in our Lifestyle collection, or see the rest of the Cleaning lineup.

All items ship direct from Japan. Follow the directions on each pack and reapply as conditions require.