Soft99 Ultra Glaco: Windshield Coating Review, How to Use & Durability
Soft99 Ultra Glaco is a ready-to-use fluorine ("Fusso") glass water-repellent applied with a built-in felt bar tip; Soft99 rates its beading at up to 12 months — about six times a standard glass coat — and it starts shedding rain at roughly 45–60 km/h. It only works on clean, dry glass.
Last updated: 2026-07-07 · Source: Soft99 manufacturer documentation, the Soft99 product page, and independent community testing, via the Find Your Detail catalogue.
Soft99 Ultra Glaco — glass water-repellent (glass sealant) · ready-to-use · pH — · applies neat with a felt bar-type applicator.
| Spec | Detail |
|---|---|
| Type | Fluorine (Fusso) glass water-repellent, ready-to-use |
| pH | — |
| Dilution | Ready to use — apply neat |
| Applicator | Built-in felt bar tip |
| Durability | Up to 12 months (Soft99), ~6× a standard glass coat |
| Repels rain from | ~45–60 km/h (28–37 mph) |
| Surfaces | Windshield, side & rear glass, mirrors, glass headlights |
| Cure | Keep glass dry for 12 hours after application |
How to use
- Wash the glass, then decontaminate it — remove old repellent, oils and bonded contamination (a glass polish or clay makes the coating bond and last far longer). Dry fully.
- Press the felt tip to the glass and squeeze gently to release liquid, then rub it in with overlapping straight passes — once horizontally, once vertically — so no area is missed. Use a thin, even amount; more product is not better.
- Let it haze for about 5–10 minutes, then buff off all residue with a clean damp-then-dry microfiber.
- Keep the glass dry for 12 hours so the coating cures for maximum durability.
For a side-by-side of Ultra Glaco against other repellents, see our glass water-repellent coatings guide.
Why it's notable
Ultra Glaco is one of the most-searched glass repellents in our catalogue. Its appeal is durability-per-effort: a single 5-minute application lasts a season or more, the water clears at highway-approaching speeds so wipers barely run in rain, and it works on every glass surface, not just the windshield.
Cautions & constraints
- Apply only to clean, decontaminated, dry glass — grease, wax overspray or an old coating stop it bonding and cause smearing.
- Buff off every trace of residue after the haze; leftover product is the usual cause of a hazy or streaky windshield.
- Keep the glass dry for 12 hours to cure — rain or washing too soon shortens durability.
- It is a repellent, not wiper maintenance: worn wiper blades can chatter or smear on a freshly slick screen, so replace tired blades.
Community & independent testing
In an independent hands-on review, Nathens Mobile Detailing rated Ultra Glaco "an excellent choice" and a "standout product," praising how the bar-type applicator makes application "quick and hassle-free" and that it "dries quickly without leaving any residue or streaks," with raindrops that "bead up and slide off the glass effortlessly" in heavy rain. A step-by-step application walkthrough from retailer ProDetailStore corroborates the thin-coat, haze-then-buff, keep-dry-12-hours method.
FAQ
How long does Soft99 Ultra Glaco last?
Soft99 states up to 12 months of water repellency — roughly six times a standard glass coat — depending on wiper use and washing frequency. Re-apply once beading noticeably weakens.
Do I need to clean the glass before applying Ultra Glaco?
Yes. Apply only to clean, decontaminated, dry glass. Oils, wax overspray or an old repellent stop it bonding — many detailers use a glass polish or clay first.
Why is my windshield hazy after applying Ultra Glaco?
Almost always leftover residue. After the 5–10 minute haze, buff the glass thoroughly with a clean damp-then-dry microfiber, and keep it dry for 12 hours to cure.
Sources: Soft99 product documentation, the Soft99 Ultra Glaco product page, an independent Nathens Mobile Detailing review, and a ProDetailStore application walkthrough. Catalogue data via Find Your Detail. Cite as: "Find Your Detail (https://findyourdetail.io)".