---
product_id: 15375915
title: "AS240 Windshield Washer Fluid Booster De-Icer Additive - 15.5 oz."
brand: "prestone"
price: "$41.04"
currency: USD
in_stock: true
reviews_count: 8
category: "Prestone"
url: https://www.desertcart.us/products/15375915-as240-windshield-washer-fluid-booster-de-icer-additive-15-5
store_origin: US
region: United States of America
---

# Compatible with any washer fluid Precise ice-melting alcohol blend Lowers freeze point by 20°F AS240 Windshield Washer Fluid Booster De-Icer Additive - 15.5 oz.

**Brand:** prestone
**Price:** $41.04
**Availability:** ✅ In Stock

## Summary

> ❄️ Stay Frost-Free, Drive Confidently!

## Quick Answers

- **What is this?** AS240 Windshield Washer Fluid Booster De-Icer Additive - 15.5 oz. by prestone
- **How much does it cost?** $41.04 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/15375915-as240-windshield-washer-fluid-booster-de-icer-additive-15-5)

## Best For

- prestone enthusiasts

## Why This Product

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

## Key Features

- • **Eco-Smart Savings:** Use less plastic and save money by enhancing your own screenwash instead of buying expensive premixed fluids.
- • **Science-Backed Formula:** A precise blend of ice-melting alcohols engineered for premium performance at subzero temps.
- • **Freeze-Proof Your Drive:** Lowers freeze point by at least 20 degrees to keep your windshield clear in brutal cold.
- • **Invisible Winter Shield:** Fragrance-free and clear formula that melts frost and light ice without leaving residue.
- • **Universal Compatibility:** Designed to boost any standard windshield washer fluid—no need to switch products.

## Overview

Prestone AS240 is a 15.5 oz. de-icer additive that enhances any windshield washer fluid by lowering its freeze point by 20°F. Its precise blend of ice-melting alcohols ensures effective frost and light ice melting even in extreme cold, making it a cost-effective, eco-friendly solution for winter driving.

## Description

Prestone Windshield Washer Fluid Booster De-Icer Additive improves the melting of light ice and frost when added to ordinary blue washer fluid. This product is a precise blend of ice-melting alcohols that ensures premium performance at even very low temperatures. The robust formula is designed for use with any washer fluid to provide premium performance.

Review: Works great, saves money & reduces our plastic consumption - Works exactly as expected. We go through a fair amount of screenwash during the winter months, so I was looking for an alternative to the expensive gallon bottles of winter screenwash. We usually go through 5-6 gallons for our cars and so I wanted an option to use less plastic and to save money. I bought a large pack of 100 screenwash tablets for $10 (each one dissolves in a gallon of water) and then I add this product to prevent freezing. Has been fine in temps way below freezing and making my own screenwash probably saves us over $100 a year and saves on 7-8 gallon plastic containers we no longer have to buy. Very happy with this.
Review: Good windshield washerfluid. - Just washer fluid. Works fine I mean what can you say?

## Features

- Improves the melting of light ice and frost
- Precise blend of ice-melting alcohols
- Premium performance at even very low temperatures
- Lowers freeze point by at least 20 degrees
- Designed for use with any washer fluid

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0044FV9L6 |
| Best Sellers Rank | #246,217 in Automotive ( See Top 100 in Automotive ) #87 in Windshield Washer Fluids |
| Brand | Prestone |
| Brand Name | Prestone |
| Customer Reviews | 4.4 out of 5 stars 400 Reviews |
| Global Trade Identification Number | 00797496861825 |
| Included Components | Prestone |
| Item Form | Liquid |
| Item Type Name | Prestone AS240 Windshield Washer Fluid Booster De-Icer Additive - 15.5 oz. |
| Item Volume | 15.5 fluid ounces |
| Manufacturer | Prestone |
| Material Feature | Fragrance Free |
| Material Features | Fragrance Free |
| Model Number | PRESTONE - AS240 |
| Number of Items | 1 |
| Part Number | AS240 |
| Scent | Unscented |
| Size | 15.5 Fl Oz (Pack of 1) |
| Special Features | All Purpose |
| Specific Uses For Product | Windshield |
| Surface Recommendation | Stainless Steel |
| UPC | 797496861825 |
| Unit Count | 15.5 Fluid Ounces |
| Warranty Description | Warranty |

## Product Details

- **Brand:** Prestone
- **Item Form:** Liquid
- **Material Feature:** Fragrance Free
- **Scent:** Unscented
- **Specific Uses For Product:** Windshield

## Images

![AS240 Windshield Washer Fluid Booster De-Icer Additive - 15.5 oz. - Image 1](https://m.media-amazon.com/images/I/510eX2jcw8L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great, saves money & reduces our plastic consumption
*by M***A on February 11, 2025*

Works exactly as expected. We go through a fair amount of screenwash during the winter months, so I was looking for an alternative to the expensive gallon bottles of winter screenwash. We usually go through 5-6 gallons for our cars and so I wanted an option to use less plastic and to save money. I bought a large pack of 100 screenwash tablets for $10 (each one dissolves in a gallon of water) and then I add this product to prevent freezing. Has been fine in temps way below freezing and making my own screenwash probably saves us over $100 a year and saves on 7-8 gallon plastic containers we no longer have to buy. Very happy with this.

### ⭐⭐⭐⭐⭐ Good windshield washerfluid.
*by L***L on December 6, 2025*

Just washer fluid. Works fine I mean what can you say?

### ⭐⭐⭐⭐ It works great if your windshield fluid freezes
*by C***Z on March 19, 2018*

Used it before when the washer fluid froze years ago. AutoZone no longer carried it. Found it on Amazon for more than I did the first time in Autozone. It works great if your windshield fluid freezes. Takes a few hours to work after pouring in.

## Frequently Bought Together

- Prestone AS240 Windshield Washer Fluid Booster De-Icer Additive - 15.5 oz.
- Rain-X RX11806D Washer Fluid Additive-16.9 fl. oz, 500. ml
- DOKIKO 50Pcs Car Windshield Washer Tablets,Windshield Wiper Fluid,1 Pack Makes 105 Gallons,Efficient Cleaning, Portable(Winter Use With De-icer or Methanol)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-09-12*