SONAX XTREME ScheibenReiniger 1:100 Screenwash Concentrate 250ml

Up to 25 litres of screenwash from a single bottle — SONAX XTREME ScheibenReiniger 1:100 as a super-concentrate

What makes SONAX's screenwash super-concentrate different? You dilute it 1:100 with water — a 250 ml bottle gives you up to 25 litres of ready-to-use screenwash that pulls bugs, road grime and film off the glass streak-free.

Nobody buys screenwash on purpose — you only think about it once the tank runs dry, either miles from home or standing in a DIY store paying over the odds for a 5-litre jug. The SONAX XTREME ScheibenReiniger 1:100 solves that with unusual efficiency: the super-concentrate in its handy 250 ml bottle goes in at 1:100 — that is 2.5 ml per 250 ml of water, or the other way round, one bottle covers 25 litres of washer fluid. That saves you serious space, weight and money compared with the classic ready-to-use screenwash.

• 1:100 dilution — one bottle, up to 25 litres. The extreme dilution ratio is the whole point of this product. Next to a 5-litre jug of ready-to-use screenwash, the 1:100 concentrate takes up a fraction of the shelf space and shipping weight. For detailers and vehicle prep businesses that top up washer tanks on customer cars, the 250 ml bottle means compact storage and precise dosing without decanting large volumes.
• Streak-free vision, no smeary residue. The formula is built to break down completely once it dries — no waxy film, no surfactant smears left on the windscreen after the blades pass. That matters for safety, because a hazy film cuts your field of vision badly the moment you drive into low sun.
• Cuts through bugs, road grime and salt residue. The active surfactants emulsify bug splatter, greasy exhaust deposits and the road film that builds up on the windscreen. Because the actives are dosed high, that cleaning power still comes through in full even at extreme dilution.

A clear view of the road is not a comfort feature, it is a safety requirement. A dirty windscreen slows your reactions, because shapes and hazards show up later through the haze. It gets worse in the rain, when bug remains and road dust mix with water and the blades smear the lot into a greasy film instead of wiping it away. A capable screenwash that is already working inside the washer bottle stops exactly that: it loosens the dirt before the blade arrives and lets the wiper lay down a clean, smear-free sweep — every single time.

Day-to-day from Detailing1: For the best results, mix the ScheibenReiniger 1:100 straight into the washer bottle: fill the tank with tap water, then add the matching amount of concentrate — for a typical 3-litre tank that is 30 ml. For baked-on bug splatter on the windscreen you can push the concentration up a bit (1:50 to 1:30) — more cleaner then goes to work with every spray-and-wipe. The 250 ml bottle is perfect to grab for the boot on a road trip: it takes up almost no space and carries you through long distances.

Super-concentrate technology behind the ScheibenReiniger 1:100 — how it works and why it is formulated this way

The SONAX XTREME ScheibenReiniger 1:100 runs a highly concentrated surfactant and cleaner formula that turns into a fully functional washer fluid once you cut it 1:100 with water. The ratio is not arbitrary: the actives are dosed so high that even after a 1:100 dilution there is still enough surfactant, sheeting agent and cleaning substance left to work properly on the windscreen and to flash off with barely any residue.

The streak-free finish comes from sheeting agents (surfactants with hydrophobic behaviour) that spread the water evenly and let it run off in a controlled way. Without them the water would sit on the glass in drops and puddles while you wipe, and dry into smears. The sheeting agents in the ScheibenReiniger 1:100 make sure the wash water spreads thin across the whole pane and dries in one even, smear-free layer.

The super-concentrate logic follows a clear product development principle: the higher the dilution ratio, the less water you ship in the finished product, the smaller the packaging and the lighter the transport footprint. With the 1:100 concentrate SONAX brings a format that is already standard in other cleaning categories but is still rare in screenwash — a clear win for anyone who cares about the environment, and for pros who want to free up storage space.

For the hard cases — heavy bug season in summer, salt smear in winter — you can temporarily push the concentration to 1:50 or 1:30. That flexibility, which a ready-to-use product simply cannot give you, lets one bottle of concentrate cover different cleaning intensities and adapt to the season.

The surfactant package in the ScheibenReiniger 1:100 is designed for biodegradability and material compatibility. The ingredients are picked so that the rubber on the wiper blades, the plastic wiper frames and the paint edges around the windscreen surround are not attacked. That is not a given with heavily concentrated formulas — cheap own-brand concentrates sometimes lean on aggressive solvents that can make rubber go brittle. SONAX tests material compatibility systematically during development, which makes it a dependable choice for continuous use in commercial fleets too.

Using the ScheibenReiniger 1:100 properly — dosing, filling and season by season

Dosing the 1:100 concentrate is easy to work out: a 3-litre washer tank takes 30 ml of concentrate, a 5-litre tank 50 ml. A simple kitchen syringe or a graduated dosing bottle gets you the exact amount without weighing anything. In real life you can also go slightly heavier without doing any harm — the ScheibenReiniger 1:100 is generously formulated and takes a moderate overdose in its stride.

For summer duty, where bugs and road dirt dominate, stick with the standard 1:100 dilution. If you are driving through bug-heavy country or down dusty back roads, take it up to 1:70 or 1:50. The SONAX XTREME ScheibenReiniger "Sommer" is the ready-to-use alternative if you would rather not measure anything at all — but the concentrate gives you far more litres for your money.

Once the tank is filled you can check the fresh screenwash straight away: a quick pull on the wiper stalk with a dry screen tells you whether the concentrate spreads evenly and wipes clear. Too little concentrate and you get smears; get it right and the glass comes up evenly clear. That simple check makes dialling in the dose easy.

On the windscreen, which sits in direct sunlight, streak-free performance really counts. Wiper smears catch the light and can cut your field of vision badly — especially into low sun on an early-morning or evening run. A screenwash that leaves nothing behind once it dries is therefore not a comfort feature but a direct contribution to safety.

If you run the concentrate across a car pool or a commercial fleet, the win is that you define one standard dose per vehicle type and simply repeat it. A small card in the store room listing tank volume and the concentrate quantity per model is all it takes — nobody needs any chemistry knowledge, they just follow the numbers. Training effort drops massively compared with more complex care systems.

Where the ScheibenReiniger 1:100 fits — all-year use and special cases

The ScheibenReiniger 1:100 concentrate is built for the summer season above all — it is not an antifreeze and it is not suitable for temperatures below freezing. In summer, when bugs, pollen, exhaust deposits and road dust load up the windscreen, the concentrate is the most efficient route to a clear view. For winter, switch to a screenwash with antifreeze.

The 250 ml bottle is ideal for the glovebox or the boot — an emergency top-up that takes up almost no room. On long trips or drives abroad you simply carry the concentrate and buy water on the way instead of hauling heavy jugs of screenwash around. That travel logic is one of the most practical advantages the super-concentrate has over ready-to-use alternatives.

For prep businesses that top up the washer tank on customer cars as part of the service, the 1:100 concentrate is the economical answer: storing a handful of 250 ml bottles takes far less room than keeping 5-litre jugs on the shelf, and the concentrate is easier to dose and portion out.

One use case that often gets overlooked is the motorhome and camper van. Motorhome drivers cover long distances through very different climates, where bug density and dust load vary wildly. The super-concentrate lets you get through a whole travel season on one small bottle — and tune the concentration to the stretch of road you are on. At the same time the compact format saves a lot of space in the limited storage of a motorhome compared with carrying jugs.

ScheibenReiniger 1:100 in comparison — concentrate vs ready-to-use and other products

Next to the ready-to-use SONAX XTREME ScheibenReiniger "Sommer", the 1:100 concentrate wins clearly on price and storage volume. Buy a 5-litre bottle of ready-mixed screenwash and you pay noticeably more per litre than with the concentrate. What the ready-to-use version has on its side is convenience: no mixing, no measuring, straight in the tank.

Against the cheap screenwash you find on any shelf, the XTREME concentrate stands out through a formula tuned for streak-free drying. Budget products often go light on sheeting agents and leave a visible film on the glass once dry. The SONAX quality standard — in the concentrate version too — makes sure the cleaning power and the streak-free finish survive even extreme dilution.

For cleaning the glass from the outside — wiping the windscreen by hand — the concentrate mixed with water in a spray bottle works well too. A little concentrate in water, laid down with a SONAX PROFILINE MicrofaserTuch "Glas", pulls the film off the glass effectively. For a deeper glass clean and care routine, the SONAX XTREME ScheibenKlar is the dedicated glass cleaner.

The price comparison gets really obvious once you look at the cost per litre of ready-to-use fluid: a typical 5-litre jug sells for around EUR 3–5, which works out at EUR 0.60–1.00 per litre. The 250 ml concentrate costs about the same and makes 25 litres — under EUR 0.50 per litre, with a clearly better cleaning result. That argument lands even with drivers who were never looking for a concentrate in the first place.

Buying the SONAX XTREME ScheibenReiniger 1:100 — who the super-concentrate is for

The super-concentrate is for anyone who wants to buy and store their screenwash sensibly — private drivers who keep a bottle in the glovebox, detailers and prep businesses that top up customer cars as a service, and travellers who would rather not haul ready-mixed screenwash across borders.

Getting into the SONAX XTREME glass care line pays off: with the ScheibenReiniger 1:100 as your washer concentrate, the ScheibenKlar as the glass cleaner for hand cleaning outside and the MicrofaserTuch "Glas" for a residue-free finish, you have everything you need for a clear view all year round in one compact set. One 250 ml bottle of ScheibenReiniger 1:100 covers a whole summer season under normal use — the kind of supply you never notice until it runs out.

If you want the full picture of the SONAX glass care system: the concentrate covers the everyday wiping, while glass cleaner and glass sealants handle the deeper manual work. Splitting it that way — automatic screenwash cleaning plus manual glass work — keeps your glass permanently clear with minimal effort, without elaborate care protocols or expensive professional treatments. The super-concentrate is the cheapest way into that system.