I love the how well the standalone gallon rain-x jugs work.will adding this to non-rain-x fluid make it work just as well as standalone? or not quite?

be cautious i had a washer fluid i added this to and 24 hours later the near as i could tell the rainx reacted with the blue dye in the washer fluid and i had clear washer fluid with a layer of blue sticky slime floating on top of it i have only had it happen once but might mix this in a jug with you preferred brand of washer fluid and let it set for a day before you add it to your vehicle reservoir to make sure it wont react the same way

Does this product work well with de-icer washer fluid? Or should I stick to the original glass treatment?

It will work with anything, if you want deicing, you must use it with a deicing washer fluid as a base, or just put 1/2 a bottle of rubbing alcohol in a gallon of water then add 4 oz RainX... the RainX on it's own does a great job as a cleaning fluid, but will freeze without some kind of additive

Everywhere I look it says don’t add just water to the tank can you or can you not just mix with water?

Yes, you can mix it with plain water - it says so right in the description. I suggest using distilled water though, because the minerals in tap water might eventually block up your lines.

Does this leave hard-to-remove stains on car? Clog windshield washer nozzles? Leave a hard-to-remove dirty film in windshield corners?

Yes! Has left bad film and water spots similar to hard water spots on the parts of the glass the wipers don't reach. Washed my windshield at the gas station and it did not come off. I am pissed. Probably going to return product and contact rain x for how to clean my windshield. Also leaves a hard water like stain in a line where right side wiper stops in middle of windshield. I do not recommend this product .

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💦 See and be seen—drive with confidence, rain or shine!

MAXIMIZE YOUR MILEAGE - One 500ml bottle treats up to 3.5 gallons (16L) of washer fluid, stretching your investment further.
UNIVERSAL COMPATIBILITY - Perfect for diesel, off-road, sports, and everyday vehicles—your windshield’s new best friend.
UPGRADE YOUR CLEANING GAME - Boosts washer fluid effectiveness, ensuring grime and water slide off with ease.
EFFORTLESS ALL SEASON PERFORMANCE - Works seamlessly with all washer fluids—even pure water in summer for spotless clarity.
CRYSTAL CLEAR VISION RAIN OR SHINE - Transforms any washer fluid into a water-repellent powerhouse for safer drives.

Rain-X Windshield Washer Fluid Additive is a 500ml concentrated formula that enhances any windshield washer fluid by adding a water-repellent effect. Compatible with all fluid types and pure water, it treats up to 16 liters, improving cleaning efficiency and visibility for a safer, clearer drive in all weather conditions.

Reviews

T**A

唯一無二です

ガラス撥水剤はレインエックスが一番ですね。このウォッシャー液添加剤は通常のウォッシャー液に混ぜても大丈夫です。よく点検で青いウォッシャー液を補充されてガッカリなんて事がありますよね。これは大丈夫なんです！

13.06.2025

大**5

便利です

ずっとレインXを使っていますが、こちらは既存のウオッシャー液に足すだけなので、使い勝手が良いでも、購入後雨が降っていないので、効果の程は不明ですなので、１つ減

28.07.2025

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Product Dimensions	18 x 17.8 x 24.1 cm; 8.5 g
Specific Uses Keywords	diesel-motor, low-rider-vehicles, off-road-vehicles, sports-compact-vehicles, trucks
Color	transparent

Rain-X Windshield Washer Fluid Additive 500ml

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