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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Rain-X Windshield Washer Fluid Additive 500ml

Rain-X Windshield Washer Fluid Additive 500ml

Product ID: 727714375

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Details

Brand
Rain-X
Item Form
Liquid
Item Volume
16.9 Fluid
Item Weight
0.3 Ounces
Material Type Free
Liquid
Number of Items
1

💧Water repellent formula

🧴500ml treats up to 16L fluid

⚙️Compatible with any washer fluid

Description

💦 See and be seen with streak-free clarity!

MAXIMIZE EVERY DROP - One 500ml bottle treats up to 16 liters of fluid for long-lasting performance
UNIVERSAL COMPATIBILITY - Works seamlessly with any washer fluid or even plain water
EFFORTLESS MAINTENANCE UPGRADE - Simply add to your washer tank—no complicated steps required
SMOOTH WIPER ACTION GUARANTEED - Enhances cleaning power and keeps your windshield streak-free
CRYSTAL CLEAR VISION RAIN OR SHINE - Transforms your washer fluid into a powerful water-repellent shield

Rain-X Windshield Washer Fluid Additive (500ml) is a premium liquid additive that enhances any windshield washer fluid by adding advanced water-repellent properties. Designed for easy mixing, this formula improves cleaning efficiency and ensures smooth wiper operation, treating up to 16 liters of fluid for extended use. Ideal for all seasons, it keeps your windshield crystal clear and your driving safer.

Specifications

ASIN	B000BPTVTK
Amazon Bestseller	#13,473 in Automotive ( See Top 100 in Automotive ) #18 in Automotive Window Washing Installation Cleaners
Brand	Rain-X
Brand Name	Rain-X
Contains Liquid Contents?	Yes
Customer Reviews	4.5 out of 5 stars 8,745 Your Review
Global Trade Identification Number	00079118118013
Item Form	Liquid
Item Volume	16.9 Fluid Ounces
Item Weight	0.3 Ounces
Manufacturer	Rain-X
Material Type Free	Liquid
Number of Items	1
Special Features	Water repellent, improves cleaning effect
Specific Uses For Product	Windshield
Surface Recommendation	Windshield
UPC	079118118013
Unit Count	500.0 Milliliters

Reviews

A**ー

少量だけ入れます

これは良いですね。純水に少し混ぜただけで効果覿面でした。使い方を間違えて全部入れてしまう人もいるようですが、この商品はウォッシャー液に少量を添加するものです。フロントガラスが綺麗になります。

4.03.2026

C**E

ワイパーがスムーズに動く様になりました。

フロントガラスがいつも✨ピカピカ✨

2.02.2026

K**N

便利です

効果あります

1.01.2026

K**N

エックス

人は何故、エックスという言葉に弱いのだろう。 "X" ね？あなたもきっとそうだと思う。 Xって、だって何か水滴をシャットアウトしそうじゃない？レインWとかレインZだったら買ってないでしょ。

17.11.2025

レ**ン

油膜

油膜も取れて、快適な視界になりました。

15.10.2025

M**マ

撥水抜群

薄めて使う。補充しやすく保管もしやすい容器です。

2.10.2025

井**介

これなら他と大差ない

あんまり効果なし

29.09.2025

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

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