21801 Liqui Moly DEF AdBlue® Anti‑Crystal Additive single Shot 100ml

Professional Additive for Preventing Crystallisation in SCR & AdBlue® Systems

Liqui Moly's DEF Anti‑Crystal Additive is a high‑performance, ash‑free treatment designed to prevent crystallisation, injector blockages, and system faults in modern diesel vehicles using SCR (Selective Catalytic Reduction) technology. Suitable for cars, vans, HGVs, agricultural machinery, and plant equipment running on 32.5% urea solution (AdBlue®/DEF).

⭐ Key Features & Benefits

• Prevents AdBlue® crystallisation in the tank, injector, and dosing lines
• Reduces deposit formation, helping maintain reliable SCR system performance
• Improves low‑temperature behaviour of AdBlue®/DEF
• Ensures extremely fine atomisation by lowering surface tension
• Supports consistent return flow, reducing the risk of system faults
• Compatible with all SCR systems using 32.5% urea solution (AdBlue®/DEF)

🧪 Application & Dosage

• Add 1% directly to the AdBlue® tank
• 100ml treats approx. 12–15 litres of AdBlue®
• Suitable for continuous, long‑term use
• Do not add to diesel fuel
• For best results, add after filling the AdBlue® tank

⚠️ Additional Information

• Frost‑sensitive product
• Shake at room temperature before use to disperse any settled components
• AdBlue® is a registered trademark of VDA (Germany)

Read more: DEF Additive Guide

Read our blog: AdBlue Crystallisation Explained – How Liqui Moly Helps Protect Your SCR System