---
product_id: 1490712
title: "Rain-X RX11806D Washer Fluid Additive-16.9 fl. oz, 500. ml"
brand: "rain-x"
price: "₨15895"
currency: LKR
in_stock: true
reviews_count: 13
category: "Rain X"
url: https://www.desertcart.lk/products/1490712-rain-x-rx11806d-washer-fluid-additive-16-9-fl-oz
store_origin: LK
region: Sri Lanka
---

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

**Brand:** rain-x
**Price:** ₨15895
**Availability:** ✅ In Stock

## Summary

> 🌟 Drive Clear, Drive Confident — Never Miss a Moment!

## Quick Answers

- **What is this?** Rain-X RX11806D Washer Fluid Additive-16.9 fl. oz, 500. ml by rain-x
- **How much does it cost?** ₨15895 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/1490712-rain-x-rx11806d-washer-fluid-additive-16-9-fl-oz)

## 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 Application:** Simply add to any washer fluid—no complicated steps, just instant upgrade to your car’s cleaning power.
- • **Seamless Compatibility:** Works perfectly with OEM wipers and popular additives like SONAX Clear View for a streak-free, crystal-clear finish.
- • **Winter-Ready Performance:** Effectively prevents frost and ice buildup, ensuring your windshield stays clean even in harsh conditions.
- • **Cost-Effective Clarity Boost:** One 16.9 fl. oz. bottle treats up to 4 gallons of fluid, delivering premium performance without premium price.
- • **Crystal-Clear Vision, Always:** Enhances windshield clarity by repelling water, sleet, and road grime for safer, stress-free driving.

## Overview

Rain-X RX11806D Washer Fluid Additive (16.9 fl. oz) upgrades your existing windshield washer fluid with advanced water-beading technology that repels rain, sleet, snow, ice, bugs, and road spray. Designed for easy mixing and cost-effective use, it enhances visibility and cleaning power, ensuring a streak-free, crystal-clear windshield in all weather conditions.

## 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: Works as described, one of the better washer fluid additives - It is a bit hard to quantify how well this works compared to some other washer fluid additives but over the course of one bottle I think I've noticed a few things. It definitely seems to help the cleaning properties in the winter, especially when you get those spots of frost on the outside of the windshield. I'm also noticing that rain water does Wick off the glass a little bit better but nothing like it would if you used the actual Rain-X product applied directly to the glass. I'm curious to see how well this works once the bugs come out in a few months, will report back on that aspect if it disappoints

## 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 | #931 in Automotive ( See Top 100 in Automotive ) #7 in Windshield Washer Fluids |
| Brand | Rain-X |
| Customer Reviews | 4.6 4.6 out of 5 stars (9,022) |
| Date First Available | June 15, 2006 |
| Exterior | Machined |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.3 ounces |
| Item model number | RX11806D |
| Manufacturer | Rain-X |
| Manufacturer Part Number | RX11806D |
| Model | RX11806D |
| Product Dimensions | 7.09 x 7.01 x 9.49 inches |
| Special Features | Streak Free |

## Product Details

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

## Images

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

## 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.

### ⭐⭐⭐⭐⭐ Works as described, one of the better washer fluid additives
*by W***R on January 27, 2026*

It is a bit hard to quantify how well this works compared to some other washer fluid additives but over the course of one bottle I think I've noticed a few things. It definitely seems to help the cleaning properties in the winter, especially when you get those spots of frost on the outside of the windshield. I'm also noticing that rain water does Wick off the glass a little bit better but nothing like it would if you used the actual Rain-X product applied directly to the glass. I'm curious to see how well this works once the bugs come out in a few months, will report back on that aspect if it disappoints

### ⭐⭐⭐⭐⭐ Wonderful
*by C***S on January 25, 2026*

Works great 👍

## 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 Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-24*