Soft99 Soft99 Glaco DX Windscreen Sealant 110ml

Four months of water beading with SARF technology — the Soft99 Glaco DX as a premium windscreen sealant

What makes the Glaco DX special? The Soft99 Glaco DX uses the exclusive SARF technology (Strong Adhesion + Rapid Finish) for a windscreen sealant that lasts up to four months. The swivelling applicator head with its large felt pad lets you apply it fast and evenly — and 110 ml is enough for up to ten windscreens.

The Soft99 Glaco DX sits between the beginner-friendly Glaco Roll On Large and the high-end Ultra Glaco — hitting the sweet spot for most drivers. With SARF technology, the Glaco DX gives you up to four months of durability while staying easy to apply. The real difference to other Glaco sealants is the applicator design: the swivelling head with its large, square felt pad follows the curve of the windscreen and covers a big area with every pass. The result is an even sealant layer with no gaps — even in the tricky corners and edges. At 110 ml, the Glaco DX is also the product that goes furthest in the Glaco sealant range, enough for around ten complete windscreen treatments.

• SARF technology for strong adhesion and fast drying. SARF stands for Strong Adhesion + Rapid Finish — the formula bonds especially tightly to the glass and dries fast into a smooth, hydrophobic layer. What that means day-to-day: more durability than the Roll On Large and faster application than the Ultra Glaco, which needs a longer curing time.
• Swivelling applicator head for a perfect fit on the glass. The moving head of the Glaco DX follows the curve of the windscreen and keeps the felt flat on the glass — not just on one edge. That stops patchy application and gives you a consistent sealant thickness across the whole windscreen.
• Up to four months of durability and it goes a long way. 110 ml is enough for around ten applications on a standard windscreen. At four months per treatment, a single bottle covers several years of windscreen sealing — outstanding value for money.

Detailing1's tip from the shop: For the best result with the Glaco DX, we recommend pairing it with the Glaco Glass Compound Roll On as prep. A thorough clean with the Compound doubles how long the Glaco DX lasts, up to four months, and gives you a more even beading. Without prep, two to three months is realistic.

How the SARF technology in the Glaco DX works

The SARF technology (Strong Adhesion + Rapid Finish) in the Glaco DX differs from the usual silicone sealants in the Glaco range through a modified molecular structure that bonds more firmly to the glass. The "Strong Adhesion" element makes the hydrophobic molecules form stronger chemical bonds with the glass than standard silicone sealants do. The result is a coating that stands up better to wiper blade wear and car washes. The "Rapid Finish" element speeds up curing: while the Ultra Glaco and its fluoropolymer formula needs an hour to cure, the Glaco DX is ready to wipe off after five to ten minutes. The sealant layer it leaves is smoother than the one from the Roll On Large and produces a more intense beading — raindrops form into near-perfect beads and get carried off by the airflow even at moderate speed. The swivelling applicator head plays a key part here: it lays the sealant film down in an even thickness, which matters because layers of uneven thickness fail sooner at the thin spots.

Applying the Glaco DX properly — a guide for maximum durability

The application of the Glaco DX ideally starts with a thorough glass prep. First clean the glass with the Glaco Glass Compound Roll On to strip off oil films and old sealant residue. Alternatively you can use the Glaco De Cleaner if the glass is only lightly soiled. Make sure the glass is dry before you lay down the Glaco DX. Take off the cap and run the swivelling applicator across the whole windscreen in crosswise passes — horizontal first, then vertical. The swivel mechanism adjusts to the curve of the glass automatically. Apply even pressure and take care not to miss any spots. Let the sealant flash off for five to ten minutes — you'll know it's ready when the surface looks slightly milky. Then wipe it off with a clean, lightly dampened microfibre cloth in straight passes. Finish by buffing with a dry cloth. A common mistake: wiping too soon. If you don't give the SARF formula enough time to set, the sealant layer ends up thinner and durability drops noticeably.

Four months of water beading — what the Glaco DX delivers day-to-day

The beading of the Glaco DX kicks in from about 45 km/h and is among the strongest in the whole Glaco range — only the Ultra Glaco with its fluoropolymer technology edges it slightly. At motorway speeds from 80 km/h, raindrops get swept off by the airflow almost instantly — an effect that really shows in heavy rain and noticeably boosts safety. The advertised four-month durability is something the Glaco DX reliably hits on a well-prepped windscreen. On an unprepped windscreen, two to three months is realistic — still well ahead of the Roll On Large and its eight to twelve weeks. If you want to stretch durability past the four months, you can freshen it up in seconds with the Glaco W-Jet. In winter, the Glaco DX also protects against road film, slush and light frost — the hydrophobic layer stops dirt from settling firmly on the glass.

Glaco DX vs. Ultra Glaco — SARF against fluoropolymer, head to head

The Glaco DX and the Ultra Glaco are the two premium sealants in the Glaco range — with different strengths. The Ultra Glaco offers the longest durability of all the Glaco products at up to twelve months, but it needs an hour to cure and a perfectly prepped, dry windscreen in a sheltered spot. The Glaco DX is the more practical option: five to ten minutes of drying time, up to four months of durability, and thanks to the swivelling applicator an even more even application than the Ultra Glaco with its narrow felt applicator. The beading is excellent on both — the Ultra Glaco is marginally stronger at low speeds thanks to its fluoropolymer base, but day-to-day from 60 km/h you'll barely notice the difference. For drivers who want a strong sealant with easy application and don't have a garage for hours of curing, the Glaco DX is often the better call. If you're after the absolute maximum and happy to put more time into the application, go for the Ultra Glaco.

Who the Glaco DX is ideal for — buying advice and target audience

The Soft99 Glaco DX is the ideal windscreen sealant for drivers who want a strong, long-lasting coating that's easy to apply. It hits the sweet spot between the affordable Glaco Roll On Large and the premium Ultra Glaco — on price and on application alike. Regular drivers benefit most: those who are happy to put in five minutes three or four times a year for their windscreen sealant and expect a reliable beading in return. The fact that one bottle covers ten windscreens also makes the Glaco DX the most cost-effective product in the range. For newcomers who want to treat themselves to something proper without reaching for the priciest product, the Glaco DX is the perfect choice. Pair it with the Glaco Glass Compound Roll On for prep, the Glaco Blave for the side windows and the Glaco Mirror Coat Zero for the wing mirrors — for a complete glass treatment all around the car.