--- product_id: 510548641 title: "Wynn's Crystal Clean & Protect - Additive for Use with AdBlue® - Prevents Crystallisation in SCR Systems - Enhances Diesel Emission Control Performance - 125ml" brand: "wynn's" price: "€ 18.58" currency: EUR in_stock: true reviews_count: 13 category: "Wynn's" url: https://www.desertcart.pt/products/510548641-wynns-crystal-clean-and-protect-additive-for-use-with-adblue store_origin: PT region: Portugal --- # 125ml bottle treats up to 15L AdBlue Enhances diesel emission control Prevents SCR system crystallisation Wynn's Crystal Clean & Protect - Additive for Use with AdBlue® - Prevents Crystallisation in SCR Systems - Enhances Diesel Emission Control Performance - 125ml **Brand:** wynn's **Price:** € 18.58 **Availability:** ✅ In Stock ## Summary > 🛠️ Keep your diesel running crystal clear — because downtime is so last year! ## Quick Answers - **What is this?** Wynn's Crystal Clean & Protect - Additive for Use with AdBlue® - Prevents Crystallisation in SCR Systems - Enhances Diesel Emission Control Performance - 125ml by wynn's - **How much does it cost?** € 18.58 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/510548641-wynns-crystal-clean-and-protect-additive-for-use-with-adblue) ## Best For - wynn's enthusiasts ## Why This Product - Trusted wynn's brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted by Pros:** Backed by Wynn’s legacy and 4.6-star rating, ensuring reliability for your diesel vehicle. - • **Drive with Confidence:** Prevents costly injector and pump blockages that lead to unexpected breakdowns. - • **Effortless Maintenance:** Simply add during every AdBlue refill for continuous protection and peak system health. - • **Eco-Friendly Efficiency:** Optimizes NOx conversion for cleaner emissions and compliance with environmental standards. - • **Crystal Clear Performance:** Dissolves early-stage AdBlue crystallisation to keep your SCR system flawless. ## Overview Wynn's Crystal Clean & Protect is a 125ml additive designed to prevent crystallisation in diesel SCR systems using AdBlue. It dissolves harmful deposits that impair injector and pump function, enhancing emission control and extending system lifespan. Compatible with all AdBlue/DEF types, it treats up to 15 liters per dose and is recommended at every refill to maintain optimal diesel engine performance and avoid costly repairs. ## Description Maintaining a clean and efficient Selective Catalytic Reduction (SCR) system is essential for diesel vehicles that utilise AdBlue as part of their emission control strategy. This advanced additive, developed specifically for use with AdBlue, helps prevent the formation of harmful crystals that can compromise the performance of the SCR system. Crystal deposits may accumulate over time in the AdBlue tank, injector, or pump unit, leading to restricted fluid flow, reduced system efficiency, and costly mechanical issues. This treatment works to dissolve early-stage crystallisation, ensuring critical SCR components remain clean and unobstructed. By keeping the system free from deposits, it supports smoother operation, improved dosing accuracy, and optimal conversion of NOx emissions—helping diesel engines meet stringent environmental standards. The regular use of this additive for AdBlue helps extend the lifespan of the SCR system, reducing the risk of unexpected breakdowns and vehicle downtime. Whether in private diesel cars or commercial fleets, it contributes to better fuel efficiency, reliable performance, and consistent emissions compliance. Formulated to be fully compatible with all recognised AdBlue and Diesel Exhaust Fluid (DEF) types, the additive is simple to apply—just pour it directly into the AdBlue tank during refills. Each 125ml bottle treats up to 15 litres of AdBlue, making it a convenient and cost-effective solution for preventive maintenance. For best results, it is recommended to use the product at every AdBlue refill to provide ongoing protection against crystallisation and keep the SCR system operating at peak performance. Review: It works like magic. - Works like magic. I had one of those dreaded warnings come up to service urea system and given 700 miles until the car would not start. I poured 1 bottle of this into the Adblue tank and drove 10 miles and it cleared the crystalized injector and warning was gone. Avoided a hefty repair. Review: Trusted brand - I have a Mercedes GLE with a 32 litre Adblue tank. I added this to an approximately 2/3rds full tank, so slightly under dosed (product is meant to be for 15L). Car has 70,000 miles on the clock, so wanted to start cleaning the components, to try and prevent costly repairs (which anyone with a Mercedes will know can be extremely high). I can’t say it made any difference to the drive, or noticed any exhaust difference, but I was using this as preventative rather than cure. The price is very reasonable for peace of mind. Adblue additives are becoming much more common now (if you read motoring forums). Despite an earlier review saying it destroyed their Mercedes SCR system, it seems to be ok in mine. I regularly used Wynns diesel additives, so trust this brand a lot. Their products are very good overall, and they have been around for a long time, with mainly 5 star reviews. Seems like a good product, and hopefully it will clean the Adblue/SCR system, and prevent problems. I will be using with every Adblue top up going forward. ## Features - Causes serious eye damage. - Contains 1,2-benzisothiazol-3(2H)-one. May produce an allergic reaction. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BV7BNHDT | | Best Sellers Rank | 160 in Automotive ( See Top 100 in Automotive ) 8 in Fuel Systems | | Brand | Wynn's | | Customer Reviews | 4.6 4.6 out of 5 stars (2,188) | | Date First Available | 8 Feb. 2023 | | Item model number | 21002 | | Manufacturer | Wynn's | | Manufacturer part number | 21002 | | Model | AdBlue Crystal Clean & Protect - 125ml | | Package Dimensions | 31.8 x 21.3 x 4.4 cm; 0.14 g | ## Images ![Wynn's Crystal Clean & Protect - Additive for Use with AdBlue® - Prevents Crystallisation in SCR Systems - Enhances Diesel Emission Control Performance - 125ml - Image 1](https://m.media-amazon.com/images/I/61PjKa6yTGL.jpg) ![Wynn's Crystal Clean & Protect - Additive for Use with AdBlue® - Prevents Crystallisation in SCR Systems - Enhances Diesel Emission Control Performance - 125ml - Image 2](https://m.media-amazon.com/images/I/51CHuy5ocCL.jpg) ![Wynn's Crystal Clean & Protect - Additive for Use with AdBlue® - Prevents Crystallisation in SCR Systems - Enhances Diesel Emission Control Performance - 125ml - Image 3](https://m.media-amazon.com/images/I/615689z6U8L.jpg) ![Wynn's Crystal Clean & Protect - Additive for Use with AdBlue® - Prevents Crystallisation in SCR Systems - Enhances Diesel Emission Control Performance - 125ml - Image 4](https://m.media-amazon.com/images/I/513JipLLJHL.jpg) ![Wynn's Crystal Clean & Protect - Additive for Use with AdBlue® - Prevents Crystallisation in SCR Systems - Enhances Diesel Emission Control Performance - 125ml - Image 5](https://m.media-amazon.com/images/I/51TJIwyzcnL.jpg) ## Questions & Answers **Q: Can you mix this with the adblue as i top it up regularly so don’t use a ful 15 l everytime** A: Read instructions on the back , says add to full tank small bottle really. **Q: My adblue warning has come on and will not go out even after filling up to full. Will this remove any crystals from my tank?** A: Yes it will but sometimes you need to run your engine for 20 miles before it will go out ## Customer Reviews ### ⭐⭐⭐⭐⭐ It works like magic. *by M***I on 21 April 2026* Works like magic. I had one of those dreaded warnings come up to service urea system and given 700 miles until the car would not start. I poured 1 bottle of this into the Adblue tank and drove 10 miles and it cleared the crystalized injector and warning was gone. Avoided a hefty repair. ### ⭐⭐⭐⭐⭐ Trusted brand *by E***1 on 11 October 2024* I have a Mercedes GLE with a 32 litre Adblue tank. I added this to an approximately 2/3rds full tank, so slightly under dosed (product is meant to be for 15L). Car has 70,000 miles on the clock, so wanted to start cleaning the components, to try and prevent costly repairs (which anyone with a Mercedes will know can be extremely high). I can’t say it made any difference to the drive, or noticed any exhaust difference, but I was using this as preventative rather than cure. The price is very reasonable for peace of mind. Adblue additives are becoming much more common now (if you read motoring forums). Despite an earlier review saying it destroyed their Mercedes SCR system, it seems to be ok in mine. I regularly used Wynns diesel additives, so trust this brand a lot. Their products are very good overall, and they have been around for a long time, with mainly 5 star reviews. Seems like a good product, and hopefully it will clean the Adblue/SCR system, and prevent problems. I will be using with every Adblue top up going forward. ### ⭐⭐⭐⭐ It works *by J***Y on 23 May 2026* Buy this item to help your AdBlue. ## Frequently Bought Together - Wynn's stabilizing/protective AdBlue additive, 125 ml, 21002 - 2 bottles DPF Filter Purge: The Most Economical Way to Clean and Protect Your Diesel Particulate Filter, Diesel Additive, High Performance Helps Regeneration No Assembling 500ml 16.9 oz x 2 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/510548641-wynns-crystal-clean-and-protect-additive-for-use-with-adblue](https://www.desertcart.pt/products/510548641-wynns-crystal-clean-and-protect-additive-for-use-with-adblue) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-06-21*