SONAX XTREME Ceramic Disc Clear "2 in 1" Glass Cleaner with Sealant 750ml

Clean and Seal Windows Streak-Free — with SONAX XTREME Ceramic ScheibenKlar 2 in 1

What does SONAX XTREME Ceramic ScheibenKlar 2 in 1 do? This glass cleaner with an integrated sealing effect cleans windows, mirrors, and headlights streak-free and applies a hydrophobic protective layer that repels rain and improves visibility in bad weather.

Clear windows are not just an aesthetic detail — they are safety-critical. Dirty, fogged, or poorly repelling windscreens increase glare from oncoming traffic and reduce reaction time. The SONAX XTREME Ceramic ScheibenKlar 2 in 1 tackles two tasks in one step: it cleans vehicle windows, mirrors, and headlights streak-free, while simultaneously applying a hydrophobic ceramic protective layer that causes raindrops to bead up. The result: less dirt accumulation, better visibility in rain and snow, and extended wiper blade lifespan — all from a single spray bottle.

• Streak-free cleaning in one step. The solvent-based formula quickly dissolves grease films, insect residue, bird droppings, and road grime. Unlike simple household glass cleaners, ScheibenKlar leaves no streaks or grease film — the microfiber cloth completely absorbs all residue, and the window is instantly clear and dry.
• Integrated sealing with beading effect. The ceramic sealing component is worked into the window surface during application. On the sealed window, raindrops run off in small beads instead of broadly obscuring visibility. The seal lasts four to six weeks, depending on weather and cleaning frequency — and can be easily refreshed by reapplying.
• Suitable for windows, mirrors, and headlights. ScheibenKlar 2 in 1 works on all glass surfaces of the vehicle — windshield, rear window, side windows, side mirrors, and polycarbonate headlights. It is also suitable for tinted windows, as the formula does not attack the tint.

Practical Tip from Detailing1: It is best to apply ScheibenKlar in two steps: First, clean the window with a damp microfiber cloth and completely remove dirt. Then, with a second, dry SONAX microfiber cloth, buff the product until the window shows an even, streak-free shine. This two-step process separates the cleaning phase from the sealing phase and ensures a more even distribution of the sealing component on a truly clean surface.

2-in-1 Glass Cleaning and Sealing — How ScheibenKlar Works in One Step

The SONAX XTREME Ceramic ScheibenKlar 2 in 1 combines two active ingredient groups in one formulation. The first component is an isopropanol-based glass cleaner that chemically dissolves grease films, oily dirt, and residues from insects, bird droppings, and road grime, which are then picked up by the cloth. Isopropanol is a proven glass cleaner that leaves no streaks and evaporates quickly on glass — the result is instant, clear shine without re-wiping.

The second component is the sealing substance, which builds the hydrophobic protective layer. It works synergistically with the cleaning component: when buffed with a dry microfiber cloth, the sealing substance is evenly worked into the glass surface. Glass is macroscopically smooth, but under a microscope, it has a porous, slightly roughened surface. The sealing molecules fill these micropores and create an even, hydrophobic layer on which water no longer adheres in flat layers but contracts into beads and runs off due to air pressure while driving.

The durability of the seal depends on several factors: frequency of window washing, intensity of weather, and quality of wiper blades. With daily use of windshield wipers and intense rain periods, the seal may diminish after four weeks. In dry periods with little wiper use, it often lasts the full six weeks or longer. Refreshing is very simple: apply ScheibenKlar again, buff — the protective layer is immediately restored.

An important aspect of the formula is its compatibility with tinted windows. Many older glass cleaners with aggressive solvents can attack the tint, especially on windows with internal tinting (color films instead of laminated glass). The ScheibenKlar formulation is explicitly approved for tinted windows, making it a safe all-rounder for all vehicle windows.

The formulation contains no silicones, which is a decisive advantage for a glass cleaner with a sealing component. Silicone-containing products on windows can lead to long-term deposits that negatively affect the beading behavior of the wiper blades and are difficult to remove completely during the next car wash. The silicone and hard wax-free sealing component of ScheibenKlar permanently binds to the glass without permanently altering the window surface — it merely protects it. This also makes the product suitable for regular users who do not want to risk deposits.

Applying ScheibenKlar 2 in 1 Correctly — Step-by-Step for Streak-Free Windows

Shake the bottle briefly before use. Spray the product on the exterior window — not on hot glass in direct sunlight, as the product will dry too quickly and leave residues. Preferably work in the shade or during cooler morning hours.

Take a lint-free SONAX microfiber cloth for windows and interiors and wipe the dirt from the window with the damp product. The cloth picks up grease film, insect residue, and dust particles. Then take a second, dry microfiber cloth and buff the product in a circular motion into the window surface until an even, streak-free shine appears. Immediately wipe off any residues that land on the vehicle's paint with a dry cloth — the product is not intended for paint and can leave deposits if left on for too long.

Do not use ScheibenKlar 2 in 1 inside the vehicle. The hydrophobic effect on interior window surfaces can cause the window to fog up more quickly, as moisture is no longer evenly distributed over the surface but beads up. For the interior window, there is the regular XTREME ScheibenKlar without a sealing component.

Cleaning the side mirrors follows the same principle: spray product, clean with a damp cloth, buff with a dry cloth. On polycarbonate headlights, light pressure is recommended when buffing — the material is more sensitive than glass and reacts to too much friction with micro-damage.

For heavily soiled windows — for example, after a long period of standing, after a tunnel drive, or after an intense insect season — it is recommended to perform the first cleaning round with a dedicated interior cleaner or a pre-wash before applying ScheibenKlar. Coarse dirt or insect residues that are stuck by a layer of road film first need mechanical dissolution so that ScheibenKlar can develop its sealing performance on a truly clean surface. Pre-washing only takes an extra minute — but the quality of the final seal is significantly better.

Clear Visibility in Rain and Snow — What the Seal Achieves in Everyday Use

The biggest everyday effect of ScheibenKlar 2 in 1 is evident in rain. On an unsealed window, rainwater spreads in a thin layer, which obscures visibility through light refraction and leads to intense glare from oncoming traffic. On a sealed window, rainwater contracts into small beads that run off independently due to the wind at higher speeds — from about 60–80 km/h. The field of vision remains clearer, and the windshield wipers need to be used less frequently.

At lower speeds and when stationary, the seal also offers an advantage: the layer reduces the adhesion of insect residues, bird droppings, and road grime. These substances stick less strongly to the hydrophobic surface and are easier to remove during the next cleaning. This is particularly relevant in the summer season when insects adhere intensely to the windshield and are difficult to remove.

In winter, the seal reduces ice adhesion to the window. Ice adheres less intensely to a hydrophobic surface, is thinner, and is easier to remove with an ice scraper. ScheibenKlar 2 in 1 is not a complete de-icing product — but it makes scraping significantly less tedious than on an unsealed window.

Even in fog and morning frost, the seal shows its strength: on sealed windows, frost settles less evenly. Instead of a uniform, firmly adhering layer of frost, often only thin crystal patterns form, which can be removed with a squeegee or ice scraper in a few strokes. Anyone who regularly has to scrape their vehicle early in the morning will clearly feel the difference after the first winter season with ScheibenKlar — especially compared to vehicles whose windows have no protective seal.

For wiper blades, the seal has a positive side effect: clean, well-repelling windows reduce the friction of the wiper blades on the glass. Wiper blades on unsealed windows with a grease film push dirt back and forth instead of removing it — this accelerates the wear of the rubber. On a sealed window, the blades glide more smoothly, clean better, and last longer.

In practice, this means: wiper blades that squeak and wipe streaky after just one season on an unsealed window often run trouble-free for two or three seasons on a window regularly treated with ScheibenKlar. The cost savings on wiper blades are an indirect but measurable benefit of regular window sealing — which quickly puts the product's purchase into perspective.

Glass Cleaners Compared — ScheibenKlar 2-in-1, ScheibenKlar Classic, and PROFILINE GlassPolish

The SONAX range includes several products for glass cleaning and care. The XTREME ScheibenKlar (without 2-in-1) is the classic glass cleaner without a sealing component. It is faster to use because no second buffing step is necessary, but it does not provide a permanent beading effect. For interior windows, where sealing would be counterproductive, it is the right choice. For exterior windows, where the sealing effect is desired, the 2-in-1 is the superior option.

For heavily scratched windows or burnt-in contaminations that a normal glass cleaner cannot remove, there is the PROFILINE GlassPolish — a glass polish with cerium oxide that removes the finest scratches from glass surfaces with a polishing machine or manually. This is a more intensive preparation step that can be used before sealing with ScheibenKlar 2 in 1 to create an immaculate starting condition.

For maximum, long-term window sealing, there is the PROFILINE CeramicCoating CC Glass — a professional ceramic seal for windows with a durability of up to 12 months. It is more complex in preparation and application but offers significantly longer durability. ScheibenKlar 2 in 1 is the everyday product for regular care; CC Glass is for intensive basic treatment or for vehicles where minimal maintenance effort is desired for months.

A frequently underestimated aspect in comparing the three products is the entry barrier. The PROFILINE CC Glass requires a complete glass preparation — polishing, cleaning, isopropanol degreasing — before the ceramic seal can be applied. Errors in preparation lead to uneven adhesion or stains that can hardly be corrected. ScheibenKlar 2 in 1, on the other hand, is more forgiving: if the window was not perfectly prepared, the seal may lose some durability in that area — but no permanent damage occurs. For private users who want clear windows without a learning curve, ScheibenKlar 2 in 1 is the right entry point into the topic of window sealing.

Buying Glass Cleaner — Who Benefits from SONAX XTREME Ceramic ScheibenKlar 2 in 1

The SONAX XTREME Ceramic ScheibenKlar 2 in 1 is aimed at vehicle owners who want to clean their windows regularly and at the same time create a lasting beading effect for better visibility and easier cleaning. The 2-in-1 concept makes it particularly attractive for anyone who wants to keep their care efforts low — one product for cleaning and protection instead of two separate steps.

ScheibenKlar 2 in 1 is particularly recommended for vehicle owners who frequently drive in the rain or who want to improve safety on wet roads. The better visibility provided by beading windows is a noticeable advantage, especially during night drives in the rain, which increases reaction safety. Regular application every four to six weeks is sufficient to maintain the effect permanently.

Even for vehicle owners who rarely wash their car or have little time for maintenance, ScheibenKlar 2 in 1 is a smart solution. Unlike dedicated window seals, which must be planned as a separate step after a complete cleaning, ScheibenKlar 2 in 1 can be conveniently integrated into the normal cleaning routine. Wiping the windows with ScheibenKlar once a month during vehicle cleaning is enough to consistently have clear, hydrophobic windows. No retooling, no second bottle, no extra time. This is the real promise of the 2-in-1 concept: maximum everyday suitability with minimal effort.

For vehicles with polycarbonate headlights that are clouded by UV radiation, ScheibenKlar 2 in 1 offers a simple maintenance solution for the surface — it cleans and protects the headlights without elaborate polishing. Used as a supplementary care product after a complete vehicle wash, it is quick to apply and delivers reliable results that improve both vehicle appearance and driving safety.

Once you have experienced the difference between unsealed and sealed windows during a rainy drive, you will make ScheibenKlar 2 in 1 a permanent part of your care routine — not because it is a luxury product, but because it delivers real, measurable added value in everyday life. Clear windows are not a luxury. They are the basis of safe driving in all weather conditions. The effort is minimal, the result immediately visible — and with 750 ml of content, one bottle lasts for many months of regular application on all glass surfaces of the vehicle.