---
product_id: 604398632
title: "Rislone 4784-6PK DEF Crystal Clean™ Diesel DEF & SCR Emissions System Cleaner, 11.8 oz (Pack of 6)"
brand: "rislone"
price: "$236.47"
currency: USD
in_stock: true
reviews_count: 8
category: "Rislone"
url: https://www.desertcart.us/products/604398632-rislone-4784-6pk-def-crystal-clean-diesel-def-and-scr
store_origin: US
region: United States of America
---

# Cleans every 5,000 miles Dissolves white crystal deposits Safe for all DEF & SCR systems Rislone 4784-6PK DEF Crystal Clean™ Diesel DEF & SCR Emissions System Cleaner, 11.8 oz (Pack of 6)

**Brand:** rislone
**Price:** $236.47
**Availability:** ✅ In Stock

## Summary

> 🚛 Crystal Clear Power: Keep your diesel emissions system spotless and your ride unstoppable!

## Quick Answers

- **What is this?** Rislone 4784-6PK DEF Crystal Clean™ Diesel DEF & SCR Emissions System Cleaner, 11.8 oz (Pack of 6) by rislone
- **How much does it cost?** $236.47 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/604398632-rislone-4784-6pk-def-crystal-clean-diesel-def-and-scr)

## Best For

- rislone enthusiasts

## Why This Product

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

## Key Features

- • **Warranty-Safe Formula:** Maintains peak emissions system health without voiding your vehicle’s new warranty.
- • **Easy Maintenance Routine:** Just add every 5,000 miles to your DEF tank and avoid expensive repairs or downtime.
- • **Universal DEF Compatibility:** Works seamlessly with all major DEF fluids including AdBlue, AUS 32, BlueTEC, and more.
- • **Keep Your Diesel Running Smooth:** Prevents costly SCR crystallization buildup that kills engine power and triggers limp mode.
- • **Optimized for Real-World Driving:** Perfect for diesel vehicles with frequent stops, low loads, and short trips prone to SCR deposits.

## Overview

Rislone 4784-6PK DEF Crystal Clean™ is a concentrated diesel exhaust fluid system cleaner designed to dissolve harmful white crystal deposits in SCR systems. Compatible with all major DEF fluids and safe for vehicles with DOC, DPF, SCR, and ASC devices, it prevents engine limp mode and maintains fuel efficiency. Recommended for use every 5,000 miles, it protects your diesel vehicle’s emissions system without voiding warranties.

## Description

RISLONE® DEF CRYSTAL CLEANTM Diesel DEF & SCR Emissions System Cleaner is a propriety blend of DEF (Diesel Exhaust Fluid) / AdBlue® compatible cleaning agents and surfactant detergents specifically designed to be safe to use and work on SCR (Selective Catalyst Reduction) systems. DEF Crystal Clean gives a cleaning effect on the entire SCR system by working to dissolve the white crystal deposits that form in the tank, pump, heater, sender, lines, injector, decomposition tube / reactor and mixer. These deposits can interfere with the normal operation of the SCR emissions system and engine, increasing fuel consumption and reducing engine power. This reduced power can lead to operating in limp mode where the vehicle will drive slowly, or become undrivable. This process restores function and with regular use maintains efficiency of the SCR. DO NOT ADD TO DIESEL FUEL TANK. INSTRUCTIONS: DEF Crystal Clean is specifically designed to only be installed in the Diesel Exhaust Fluid / AdBlue tank which usually has a blue cap. Do not add to the diesel fuel tank. * Light Truck or Mid-Size to Large SUV - 5 to 9 gallon tank capacity install full bottle into DEF tank. *Car or Small SUV - 3 to 5 gallon tank capacity use approximately 1/2 bottle. *Medium and Heavy Duty Diesel Trucks - 10 to 20 gallon tank capacity use 2 bottles. Pour DEF Crystal Clean into mostly full DEF tank or add and fill tank with diesel exhaust fluid. If light is still on after 250 miles or a few days of driving, second application may be required, or mechanical attention is needed. NOTE: Works with all approved diesel exhaust fluids. Some vehicles use a special filling adapter to install DEF / AdBlue into the tank. For those vehicles use special funnel or pour into mostly empty DEF / AdBlue bottle and install in system.

Review: 2015 ram 6.7 - Works good, cleared the p20ee code
Review: Great for DEF. - Very good idea and quality.

## Features

- Excellent for diesel vehicles driven regularly at slow speeds, low loads, short durations or make frequent stops as these are more prone to having the problem of crystallization deposit build up in the SCR system.
- Regular use every 5,000 miles not only keeps the system clean, but works to prevent the white crystallization issues from returning.
- Will not void manufacturer’s new vehicle warranty. Specifically designed and safe to use on vehicles which have DOC catalytic converters, DPF particulate filters, SCR selective catalytic reduction devices, ASC ammonia slip catalyst or DEF / AdBlue systems.
- Works with all AdBlue, Aria 32 (Automotive Nitrogen Oxide Liquid Reducing Agent), AUS 32 (Aqueous Urea Solution), BlueHDi, BlueTEC, Cummins, DEF UREA, Duramax, EcoDiesel, PowerStroke, TDI Clean Diesel, and many more.
- DEF Crystal Clean is specifically designed to only be installed in the Diesel Exhaust Fluid / AdBlue tank which usually has a blue cap. Do not add to the diesel fuel tank.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CRSVRXXQ |
| Best Sellers Rank | #2,378 in Automotive ( See Top 100 in Automotive ) #16 in Fuel System Cleaners |
| Brand | Rislone |
| Customer Reviews | 4.5 4.5 out of 5 stars (428) |
| Date First Available | January 8, 2024 |
| Item Weight | 6.12 pounds |
| Item model number | 4784-6PK |
| Manufacturer | Bar's Products |
| Manufacturer Part Number | 4784-6PK |
| Model | Diesel DEF & SCR Emissions |
| Package Dimensions | 9.45 x 8.54 x 5.83 inches |
| Special Features | Concentrated |

## Product Details

- **Brand:** Rislone
- **Item Form:** Liquid
- **Material Feature:** Automotive
- **Scent:** Unique
- **Specific Uses For Product:** Automotive

## Images

![Rislone 4784-6PK DEF Crystal Clean™ Diesel DEF & SCR Emissions System Cleaner, 11.8 oz (Pack of 6) - Image 1](https://m.media-amazon.com/images/I/813ZGvcnD2L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 2015 ram 6.7
*by A***R on January 18, 2026*

Works good, cleared the p20ee code

### ⭐⭐⭐⭐⭐ Great for DEF.
*by J***. on December 30, 2025*

Very good idea and quality.

### ⭐⭐⭐⭐⭐ This product works!
*by M***D on November 17, 2025*

I bought a used 2021 F250 with 75k miles. At first it was drinking DEF. I used 3/4 of a tank on a 900 mile road trip. I used this product on the first tank on my 5900 mile move to Alaska from Virginia. The first 3/4 tank of DEF, with the product in it, got me to Indianapolis, about 800 miles. The second tank I started using the Rislone DEF Treatment in every box I put in the truck, it got me to Mitchell, SD which was about 1000 miles and I used half a tank. About 1200 miles later I put 1 box of DEF in before I crossed into Canada, and stocked up on 3 boxes knowing I had about 3k more to go. Keep in mind, I'm hauling a 20ft enclosed trailer full of all my earthly possessions, and I have quite a few tools and heavy things. Something happened after that first 3k miles. I made it the next 3k miles and only used 1/2 tank. Now when I fill up it says 7500 miles to empty. I don't know if that's true, but it's been a long time since I've had to buy DEF.

## Frequently Bought Together

- Rislone 4784-6PK DEF Crystal Clean™ Diesel DEF & SCR Emissions System Cleaner, 11.8 oz (Pack of 6)
- Rislone 4780-6PK Diesel DEF Treatment | Prevents AdBlue/DEF Fluid Crystallization, 8 oz (Pack of 6)
- Rislone® 4744-4PK DPF Clean™ Diesel DPF, Exhaust & Emissions System Cleaner, 16.9 oz, 4-Pack

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-01*