Soft99 Soft99 Glaco DX Windscreen Sealant 110ml

Four Months of Beading Effect with SARF Technology — Soft99 Glaco DX as a Premium Windshield Sealant

What makes Glaco DX special? Soft99 Glaco DX uses exclusive SARF Technology (Strong Adhesion + Rapid Finish) for a windshield sealant with up to four months of durability. The swivel applicator head with a large felt pad allows for quick, even application — and 110 ml is enough for up to ten windshields.

The Soft99 Glaco DX positions itself between the beginner-friendly Glaco Roll On Large and the high-end product Ultra Glaco — thus hitting the sweet spot for most drivers. With SARF Technology, Glaco DX offers up to four months of durability with an uncomplicated application. The crucial difference from other Glaco sealants lies in the applicator design: The swivel head with a large, square felt pad conforms to the curvature of the windshield and covers a large area per stroke. The result is an even sealant layer without gaps — even in hard-to-reach corners and edges. With 110 ml content, Glaco DX is also the most economical product in the Glaco sealant series and is sufficient for about ten complete windshield treatments.

• SARF Technology for strong adhesion and quick drying. SARF stands for Strong Adhesion + Rapid Finish — the formula bonds particularly firmly to the glass surface and dries quickly to a smooth, hydrophobic layer. In practice, this means: Higher durability than the Roll On Large and faster application than the Ultra Glaco, which requires a longer curing time.
• Swivel applicator head for optimal windshield adaptation. The movable head of the Glaco DX follows the curvature of the windshield, ensuring that the felt always lies flat — not just with an edge. This prevents uneven application and ensures a consistent sealant thickness across the entire windshield.
• Up to four months of durability with extreme efficiency. 110 ml is enough for about ten applications on a standard windshield. With a durability of four months per treatment, a single bottle covers several years of windshield sealing — an excellent price-performance ratio.

Detailing1 Pro Tip: For the best results with Glaco DX, we recommend combining it with Glaco Glass Compound Roll On as preparation. Thorough cleaning with the compound doubles the durability of Glaco DX to four months and ensures a more even beading effect. Without preparation, two to three months is realistic.

How Glaco DX's SARF Technology Works

The SARF Technology (Strong Adhesion + Rapid Finish) of Glaco DX differs from conventional silicone sealants in the Glaco series due to a modified molecular structure that bonds more firmly to the glass surface. The "Strong Adhesion" element ensures that the hydrophobic molecules form stronger chemical bonds with the glass than with standard silicone sealants. The result is a coating that is more resistant to wiper abrasion and car washes. The "Rapid Finish" element accelerates curing: While the Ultra Glaco with its fluoropolymer formula requires an hour of curing time, Glaco DX is ready to wipe off after five to ten minutes. The resulting sealant layer is smoother than that of the Roll On Large and creates a more intense beading effect — raindrops form into nearly perfect spheres and are carried away by the wind at moderate speeds. The swivel applicator head plays an important role: It applies the sealant film in a uniform thickness, which is crucial because unevenly thick layers fail faster at the thin spots.

Applying Glaco DX Correctly — Instructions for Maximum Durability

The application of Glaco DX ideally begins with thorough glass preparation. First, clean the windshield with the Glaco Glass Compound Roll On to remove oil films and old sealant residues. Alternatively, you can use Glaco De Cleaner if the windshield is only lightly soiled. Make sure the windshield is dry before applying Glaco DX. Remove the cap and run the swivel applicator in criss-cross patterns over the entire windshield — first horizontally, then vertically. The swivel mechanism automatically adapts to the windshield's curvature. Apply even pressure and make sure not to miss any spots. Let the sealant dry for five to ten minutes — you'll know it's ready when the surface appears slightly milky. Then wipe off with a clean, slightly damp microfiber cloth in straight lines. Finally, polish with a dry cloth. A common mistake: Wiping too soon. If you don't give the SARF formula enough time to dry, the sealant layer will be thinner, and durability will decrease significantly.

Four Months of Beading Effect — What Glaco DX Delivers in Everyday Use

The beading effect of Glaco DX is noticeable from approximately 45 km/h and is among the strongest in the entire Glaco series — only the Ultra Glaco with its fluoropolymer technology slightly surpasses it. At highway speeds above 80 km/h, raindrops are practically immediately carried away by the wind — an effect that is particularly noticeable in heavy rain and significantly increases safety. Glaco DX reliably achieves its advertised durability of four months on a well-prepared windshield. On an unprepared windshield, two to three months is realistic — still significantly more than the Roll On Large with its eight to twelve weeks. If you want to extend the durability beyond four months, you can use the Glaco W-Jet for a quick refresh in seconds. In winter, Glaco DX also protects against road film, slush, and light frost — the hydrophobic layer prevents dirt from settling firmly on the windshield.

Glaco DX vs. Ultra Glaco — SARF vs. Fluoropolymer in Comparison

The Glaco DX and the Ultra Glaco are the two premium sealants in the Glaco series — with different strengths. The Ultra Glaco offers the longest durability of all Glaco products, up to twelve months, but requires an hour of curing time and a perfectly prepared, dry windshield in a protected environment. The Glaco DX is the more practical alternative: Five to ten minutes of drying time, up to four months of durability, and thanks to the swivel applicator, even more even application than the Ultra Glaco with its narrow felt applicator. The beading effect is excellent with both products — the Ultra Glaco, due to its fluoropolymer base, is slightly stronger at low speeds, but in everyday use above 60 km/h, the difference is hardly noticeable. For drivers who want a strong sealant with easy application and do not have a garage for hours of curing, the Glaco DX is often the better choice. Those seeking absolute maximum performance and willing to invest more time in application should opt for the Ultra Glaco.

Who is Glaco DX Ideal For — Purchase Recommendation and Target Audience

The Soft99 Glaco DX is the optimal windshield sealant for drivers who are looking for a strong, long-lasting coating with uncomplicated application. It hits the sweet spot between the affordable Glaco Roll On Large and the premium product Ultra Glaco — both in terms of price and application. Regular drivers who want to invest five minutes in their windshield sealant three to four times a year and expect a reliable beading effect will particularly benefit. The extreme yield of ten windshields per bottle also makes Glaco DX the most cost-effective product in the series. For newcomers who want to treat themselves to something high-quality without opting for the most expensive product, Glaco DX is the perfect choice. Combine it with the Glaco Glass Compound Roll On for preparation, the Glaco Blave for the side windows, and the Glaco Mirror Coat Zero for the exterior mirrors — for a complete glass treatment around the vehicle.