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 ウィンドシールドウォッシャーフルードアディティブ 500ml

Product ID: 727714375

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

💦 Drive clear, drive confident — repel water like a pro!

TRUSTED BY THOUSANDS - Join over 8,700 satisfied users who rate it 4.5 stars for consistent performance.
ENHANCED CLEANING POWER - Boosts your washer fluid’s ability to remove grime and road film effortlessly.
UNIVERSAL COMPATIBILITY - Seamlessly blends with any washer fluid or even plain water for year-round use.
MAXIMIZED VALUE MINIMAL EFFORT - One 500ml bottle enhances up to 16 liters of washer fluid—efficiency meets convenience.
CRYSTAL CLEAR VISION RAIN OR SHINE - Transforms your windshield into a water-repellent shield for safer, streak-free drives.

Rain-X Windshield Washer Fluid Additive is a 500ml liquid concentrate designed to be mixed with any windshield washer fluid or clean water. It creates a water-repellent coating on your windshield, improving visibility and safety by causing water to bead and roll off. This additive also enhances the cleaning power of your washer fluid, making it easier to remove dirt and grime. One bottle treats up to 16 liters of fluid, making it a cost-effective upgrade for year-round windshield care.

Specifications

ASIN	B000BPTVTK
ASIN	B000BPTVTK
Amazon Bestseller	#11,844 in Automotive ( See Top 100 in Automotive ) #14 in Automotive Window Washing Installation Cleaners
Brand Name	Rain-X
Contains Liquid Contents?	Yes
Customer Reviews	4.5 4.5 out of 5 stars (8,770)
Global Trade Identification Number	00079118118013
Is Discontinued By Manufacturer	No
Item Form	Liquid
Item Volume	16.9 Fluid Ounces
Item Weight	0.3 Ounces
Item model number	RX11806D
Manufacturer	Rain-X
Manufacturer	Rain-X
Material Type Free	Liquid
Number of Items	1
Product Dimensions	18 x 17.8 x 24.1 cm; 8.5 g
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

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

ぽ**ま

ガラコ等のようにがっつり弾くことを期待しているとそこまでではないですが、明らかに何もしないよりかは弾きは良いです。がっつりと弾かない反面、油膜が酷くなることも少ない（遅い）ように感じます。希釈して使える点が良いのでリピート購入しています。

5.04.2026

K**N

効果あります

1.01.2026

C**E

フロントガラスがいつも✨ピカピカ✨

2.02.2026

K**N

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

油膜も取れて、快適な視界になりました。

15.10.2025

井**介

あんまり効果なし

29.09.2025

M**マ

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

J**Y

Très bien fonctionne très bien

20.03.2026

A**L

It work perfectly in rain,

27.12.2025

P**R

Nice product. Recommended

5.02.2026

M**M

Excellent, rain just bleeds of the screen. Works in conjunction with rainx screen cleaner very effectively. Will always use going forward.

8.06.2014

S**Y

Recommend

30.01.2024

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Rain-X ウィンドシールド ウォッシャーフルード アディティブ 500ml

Details

Details

Description

Specifications

Reviews

Common Questions

Rain-X ウィンドシールドウォッシャーフルードアディティブ 500ml