---
product_id: 1490712
title: "RX11806D Washer Fluid Additive-16.9 fl. oz, 500. ml"
brand: "rain-x"
price: "€ 21.08"
currency: EUR
in_stock: true
reviews_count: 8
category: "Rain X"
url: https://www.desertcart.nl/products/1490712-rx11806d-washer-fluid-additive-16-9-fl-oz-500-ml
store_origin: NL
region: Netherlands
---

# 16.9 fl. oz. concentrated additive Prevents sleet, snow & ice buildup Advanced water-beading tech RX11806D Washer Fluid Additive-16.9 fl. oz, 500. ml

**Brand:** rain-x
**Price:** € 21.08
**Availability:** ✅ In Stock

## Summary

> 💦 Drive Clear, Drive Confident: The Ultimate Glass Upgrade You Can’t Afford to Miss!

## Quick Answers

- **What is this?** RX11806D Washer Fluid Additive-16.9 fl. oz, 500. ml by rain-x
- **How much does it cost?** € 21.08 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/1490712-rx11806d-washer-fluid-additive-16-9-fl-oz-500-ml)

## Best For

- rain-x enthusiasts

## Why This Product

- Trusted rain-x brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Integration:** Simply add to your existing washer fluid—no complicated setup, just instant upgrade.
- • **All-Season Glass Defense:** Fights off sleet, snow, ice, bugs, and road grime so your view stays pristine year-round.
- • **Next-Level Water Beading:** Harnesses Rain-X’s signature tech to repel rain instantly—see and be seen in any weather.
- • **Cost-Effective Clarity Boost:** Small doses treat gallons of fluid, delivering premium performance without premium price.
- • **Crystal-Clear Vision Every Drive:** Transforms your windshield with streak-free clarity for safer, stress-free commutes.

## Overview

Rain-X RX11806D Washer Fluid Additive is a 16.9 fl. oz. concentrated formula designed to enhance your windshield washer fluid with advanced water-beading technology. It improves visibility by preventing and removing sleet, snow, ice, bugs, and road spray, ensuring streak-free, crystal-clear glass in all weather conditions. Easy to use and compatible with most vehicles, this additive offers a cost-effective solution for safer, clearer drives.

## Description

Simply add Rain‑X Washer Fluid Additive to water or any windshield washer fluid to apply Rain‑X technology.

Review: Works brilliantly paired with SONAX Clear View - Used together (Rain-X + SONAX Clear View 1:100), my 2023 Model Y’s windshield went from dusty/filmy to crystal clear after one wipe—exactly what the pics show (before / mix / after). Beads water nicely, cuts road film, and played fine with the OEM wipers. Pros Instant clarity; no smearing Strong water beading for rain driving Cost-effective: small amounts treat a lot of fluid Tesla Y compatible (no chatter from my blades) Cons Add too much and you can get light residue—measure your mix My mix (works great): SONAX Clear View: 1:100 (≈25 ml per 2.5 L / ~0.85 fl oz per 2.6 qt) Rain-X Additive: ~4–4.5 fl oz per gallon of water (the 16.9 oz bottle treats ~4 gal) Tips Start conservatively on Rain-X; you can add more if needed. Top up with distilled water when possible. If switching from another fluid, run a few sprays to purge the old mix. Bottom line: this combo is an easy, inexpensive one-wipe to crystal-clear upgrade.
Review: Product just works - Great Product and Additive for your daily drivers.

## Features

- Add to existing washer fluid
- Applies water beading technology
- Enhances driving visibility
- Helps prevent and remove sleet, snow, ice, bugs and road spray from sticking to glass
- Improves cleaning

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000BPTVTK |
| Best Sellers Rank | #917 in Automotive ( See Top 100 in Automotive ) #11 in Windshield Washer Fluids |
| Brand | Rain-X |
| Brand Name | Rain-X |
| Contains Liquid Contents? | Yes |
| Customer Reviews | 4.6 out of 5 stars 8,954 Reviews |
| Global Trade Identification Number | 00079118118013 |
| Included Components | 1 bottle |
| Item Form | Spray |
| Item Height | 24.1 centimeters |
| Item Type Name | Rain-X RX11806D Washer Fluid Additive - 16.9 fl. oz. |
| Item Volume | 16.9 Fluid Ounces |
| Item Weight | 0.3 Ounces |
| Manufacturer | Rain-X |
| Material Feature | Unscented |
| Material Features | Unscented |
| Material Type Free | Alcohol Free |
| Number of Items | 1 |
| Scent | Unscented |
| Special Features | Streak Free |
| Specific Uses For Product | Windshield |
| Surface Recommendation | Glass |
| UPC | 079118118013 |
| Unit Count | 16.9 Fluid Ounces |
| Warranty Description | 30 Days |

## Product Details

- **Brand:** Rain-X
- **Item Form:** Spray
- **Material Feature:** Unscented
- **Scent:** Unscented
- **Specific Uses For Product:** Windshield

## Images

![RX11806D Washer Fluid Additive-16.9 fl. oz, 500. ml - Image 1](https://m.media-amazon.com/images/I/51cNcELxXJL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Questions & Answers

**Q: 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?**
A: 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

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

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

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works brilliantly paired with SONAX Clear View
*by Z***S on December 13, 2025*

Used together (Rain-X + SONAX Clear View 1:100), my 2023 Model Y’s windshield went from dusty/filmy to crystal clear after one wipe—exactly what the pics show (before / mix / after). Beads water nicely, cuts road film, and played fine with the OEM wipers. Pros Instant clarity; no smearing Strong water beading for rain driving Cost-effective: small amounts treat a lot of fluid Tesla Y compatible (no chatter from my blades) Cons Add too much and you can get light residue—measure your mix My mix (works great): SONAX Clear View: 1:100 (≈25 ml per 2.5 L / ~0.85 fl oz per 2.6 qt) Rain-X Additive: ~4–4.5 fl oz per gallon of water (the 16.9 oz bottle treats ~4 gal) Tips Start conservatively on Rain-X; you can add more if needed. Top up with distilled water when possible. If switching from another fluid, run a few sprays to purge the old mix. Bottom line: this combo is an easy, inexpensive one-wipe to crystal-clear upgrade.

### ⭐⭐⭐⭐⭐ Product just works
*by A***G on January 12, 2026*

Great Product and Additive for your daily drivers.

### ⭐⭐⭐⭐⭐ Easy and functional
*by C***A on November 24, 2025*

I love this product. It solves the issue of having to reapply Rain X. You simply add it to your washer fluid and it constantly adds the solution without having to make a separate chore of it. The product also works as advertised, making water bead up, making it almost unnecessary to use wipers, unless it’s raining hard.

## Frequently Bought Together

- Rain-X RX11806D Washer Fluid Additive-16.9 fl. oz, 500. ml
- Rain-X 800002250 Glass Treatment Trigger, 16 Fl Oz - Exterior Glass Treatment to Dramatically Improve Wet Weather Driving Visibility During All Weather Conditions
- Rain-X 5071268 2-in-1 Glass Cleaner and Rain Repellant, 23 oz. (Pack of 1) - Provides a Streak-Free Clean for Automotive Glass While Preventing Sleet, Snow, Ice, and Road Spray Build Up

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-01*