---
product_id: 603801989
title: "Rislone 4784 Crystal Clean Diesel DEF & SCR Emission System Cleaner, 1-Pack | Improves DEF Diesel Exhaust Fluid, Restores SCR Selective Catalyst Reduction, Cleans DEF Injector & Sender, 11.8 oz"
brand: "rislone"
price: "R649"
currency: ZAR
in_stock: true
reviews_count: 8
category: "Rislone"
url: https://www.desertcart.co.za/products/603801989-rislone-4784-crystal-clean-diesel-def-and-scr-emission-system
store_origin: ZA
region: South Africa
---

# Dissolves white crystallization deposits Prevents SCR system limp mode Compatible with all DEF/AdBlue fluids Rislone 4784 Crystal Clean Diesel DEF & SCR Emission System Cleaner, 1-Pack | Improves DEF Diesel Exhaust Fluid, Restores SCR Selective Catalyst Reduction, Cleans DEF Injector & Sender, 11.8 oz

**Brand:** rislone
**Price:** R649
**Availability:** ✅ In Stock

## Summary

> 🛠️ Clean Your DEF, Save Your Drive — Don’t Let Crystals Slow You Down!

## Quick Answers

- **What is this?** Rislone 4784 Crystal Clean Diesel DEF & SCR Emission System Cleaner, 1-Pack | Improves DEF Diesel Exhaust Fluid, Restores SCR Selective Catalyst Reduction, Cleans DEF Injector & Sender, 11.8 oz by rislone
- **How much does it cost?** R649 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/603801989-rislone-4784-crystal-clean-diesel-def-and-scr-emission-system)

## 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:** Specifically designed to maintain your vehicle’s new manufacturer warranty without risk.
- • **Cut DEF Consumption & Save:** Real user results show dramatic reduction in DEF usage, extending refill intervals and lowering costs.
- • **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 system failures and limp mode with regular use every 5,000 miles.
- • **Comprehensive SCR System Cleaner:** Targets deposits in tank, pump, lines, injectors, and reactors to restore peak emissions system efficiency.

## Overview

Rislone 4784 DEF Crystal Clean™ is a premium 11.8 oz diesel exhaust fluid additive engineered to dissolve harmful white crystallization deposits in SCR emissions systems. Compatible with all DEF/AdBlue fluids and safe for vehicles with DOC, DPF, SCR, ASC, and other advanced emissions tech, it prevents limp mode and reduces DEF consumption. Regular use every 5,000 miles keeps your diesel running efficiently 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: How costly it will be if you don't use it. - Seems to work. But how would you know until after some time.
Review: 2016 Ram 1500 Ecodiesel DEF Consumption - We have a 2016 Ram 1500 Ecodiesel and prior to using this product I was eating up half a tank of DEF every month. I ran back to back bottles and started using the DEF at our local Fry’s store. The DEF consumption went down dramatically. Folks, this stuff really works. We are having to fill the DEF every two months now. Fantastic product and works extremely well.

## 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 | B0CRSY78LR |
| Best Sellers Rank | #2,870 in Automotive ( See Top 100 in Automotive ) #13 in Fuel System Cleaners |
| Brand | Rislone |
| Brand Name | Rislone |
| Customer Reviews | 4.6 out of 5 stars 568 Reviews |
| Included Components | (1) DEF and SCR Treatment |
| Item Form | Liquid |
| Item Type Name | Diesel DEF & SCR Emissions System Cleaner |
| Item Volume | 11.8 fluid ounces |
| Manufacturer | Bar's Products |
| Material Feature | Scented |
| Material Features | Scented |
| Model Number | 4784 |
| Number of Items | 1 |
| Part Number | 4784 |
| Scent | Unique |
| Size | 1 Fl Oz (Pack of 1) |
| Special Features | Automotive |
| Specific Uses For Product | Automotive DEF additive |
| Surface Recommendation | Automotive |
| UPC | 078615047840 |
| Unit Count | 1 Fluid Ounces |
| Warranty Description | Please see manufacturer |

## Product Details

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

## Images

![Rislone 4784 Crystal Clean Diesel DEF & SCR Emission System Cleaner, 1-Pack | Improves DEF Diesel Exhaust Fluid, Restores SCR Selective Catalyst Reduction, Cleans DEF Injector & Sender, 11.8 oz - Image 1](https://m.media-amazon.com/images/I/71hRUzjYRyL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ How costly it will be if you don't use it.
*by E***L on July 9, 2026*

Seems to work. But how would you know until after some time.

### ⭐⭐⭐⭐⭐ 2016 Ram 1500 Ecodiesel DEF Consumption
*by T***Y on January 25, 2026*

We have a 2016 Ram 1500 Ecodiesel and prior to using this product I was eating up half a tank of DEF every month. I ran back to back bottles and started using the DEF at our local Fry’s store. The DEF consumption went down dramatically. Folks, this stuff really works. We are having to fill the DEF every two months now. Fantastic product and works extremely well.

### ⭐⭐⭐⭐⭐ Diesel
*by M***A on June 27, 2026*

Def fluid cleaning

## Frequently Bought Together

- Rislone 4784 DEF Crystal Clean™ Diesel DEF & SCR Emissions System Cleaner, 11.8 oz
- Rislone 4780 Diesel DEF Treatment | Prevents AdBlue/DEF Fluid Crystallization, 8 oz
- Rislone® 4744 DPF Clean™ Diesel DPF, Exhaust & Emissions System Cleaner, 16.9 oz, 1-Pack

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-07-27*