Developed to the same high performance standards you’ve come to expect from prestone, eco refill winter screen wash can also help you to reduce plastic waste. thanks to its concentrated formula, just one small bottle of 500ml prestone eco refill makes 5 litres of winter-ready screen wash – that’s a whole standard-sized bottle of screen wash for a fraction of the plastic

The Halfords -20 Concentrated Screenwash 5L offers exceptional performance if used neat all year round. It keeps your vehicle's screen free from bugs, dirt and road grime. portable - contrast to a bottle of car screen washer fluid, the screen wash tablet for car is lightweight, it does not take up too much space, and solid for easy storage. Seasonal versatility: adapt seamlessly to changing seasons. dilute the concentrate during spring and summer to create up to a staggering 100 liters of screenwash, ensuring you're well-equipped year-round. note - 1 tabblet 4l is the way of summer use and does not prevent water from freezing in the tank during winter. the temperature requirement needs to be higher than -5℃(23℉). it's better to mix with an antifreeze agent to improve cleaning performance in winter.In summer, it makes up to 10 litres and give protection against freezing down to -2C. If you need to go any colder it’ll need to be used 1:1 or even neat. The instructions say this will remain fluid down to -10C, so unsurprisingly it was solid after a few hours in our freezer compartment.

At a summer mix rate of 4:1 the Halfords wash cleared both the glue and the oil after a few wipes, giving the best cleaning performance in the test. Autoglym Ultimate Screenwash 500mlWhereas recycling plastic containers is a good option, many also find their way into landfills and also some even get dumped into our oceans – which is becoming a major environmental problem around the world. The bottle of Wynns is the smallest here, yet it claims to be ‘Super Concentrated’ and offer protection down to -70C. In reality though, that headline figure of -70C is only if you use the Wynns neat, which is unlikely to be necessary in the UK.

Our top priorities are creating a quality product that will enhance your car windscreen and, of course, benefit the environment. However, we are also conscious that sustainable alternatives are often more expensive than regular items. This is not the case with our Diamond car windscreen wash. We pride ourselves on producing high-quality screenwash with a low price tag. Can I just use water? It is best to use a screenwash as these have been specially formulated to effectively clear your windscreen. Water will not contain the cleaning agents that screenwash has, so may not be able to remove tough dirt such as tree sap. Water also has a freezing point of 0ºC. 2. Does it matter what Screenwash you use? The Halfords -10 Concentrate Screenwash has a warm berry fragrance and keeps your windscreen free from bugs, dirt and road grime. The instructions recommend it is used at the ‘optimum clean’ dilution ratio of 1:9, which stops freezing down to a claimed -3 oC. This depends on the time of year. The colder it is, the more screen wash you'll need to prevent the liquid freezing in extreme cold. Each bottle of screen wash will detail the proportion of wash per litre of water, depending on the time of year. 3. Is Screenwash the same as antifreeze?All the normal additives in screen wash can be made into a soluble solid. Within a few seconds of being submerged in water the tablet dissolves. As you might expect from the well-known and respected brand like Autoglym, the screenwash did well in the cleaning tests – but it’s expensive to use at winter temperatures. We managed to use one tablet for 4 litres of water and achieved really good cleaning results with it! As we knew our freezer was measured at 18C, we mixed at a ratio of 1.5:1 which should have given us protection down to 19.5C. However, although there was some liquid evident in the syringe it was too frozen to squirt until it had been out of the freezer for a few minutes. Tesco Concentrated Screen Wash (& Tesco Ready To Use) However, there was some good news. As we didn’t need the full -20C protection we economised and tried a few different concentrations to see how they fared in the freezer. A mix of 50/50 with water was still squirting after 12 hours at -18C, so it would seem Halfords is understating its performance.