{"product_id":"rislone-def-crystal-clean-diesel-def-scr-emission-system-cleaner-1-pack-dissolves-urea-crystals-def-compatible","title":"Rislone DEF Crystal Clean Diesel DEF \u0026 SCR Emission System Cleaner, 1-Pack — dissolves urea crystals, DEF-compatible","description":"\u003cp\u003e\u003cstrong\u003eRislone 4784 DEF Crystal Clean is a concentrated cleaner formulated to dissolve DEF\/AdBlue crystallization and restore proper function to SCR emissions systems when added to the DEF tank.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eModern diesel emissions systems rely on Diesel Exhaust Fluid (DEF) and Selective Catalytic Reduction (SCR) components that can accumulate hard, white urea crystals over time. These deposits build inside the DEF tank, pump, heater, lines, injector, decomposition tube\/reactor and mixer, reducing SCR efficiency and leading to higher fuel use, diminished engine responsiveness or fault indicators. Rislone's DEF Crystal Clean is a proprietary blend of DEF-compatible cleaning agents and surfactants designed to dissolve those deposits and help return the system to normal operation when used according to capacity guidelines.\u003c\/p\u003e\n\n\u003ch3\u003eHow does DEF Crystal Clean remove crystallization from the SCR system?\u003c\/h3\u003e\n\u003cp\u003eThe formula contains surfactant detergents and solvent agents that break down and suspend urea-derived crystals so they can be circulated out of the tank and expelled or diluted by fresh DEF. It targets buildup throughout the entire DEF circuit rather than only treating a single component.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDissolves white urea crystals in tank, pump, heater, lines and injector.\u003c\/li\u003e\n  \u003cli\u003eCompatible with all approved DEF\/AdBlue fluids—safe to mix and dilute.\u003c\/li\u003e\n  \u003cli\u003eWorks during normal driving to help flush loosened deposits from the system.\u003c\/li\u003e\n  \u003cli\u003eNon-fuel application: add only to the DEF\/AdBlue tank (usually blue cap).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat amount should I use for my vehicle and how do I apply it?\u003c\/h3\u003e\n\u003cp\u003eDosage depends on DEF tank capacity. Pour the recommended quantity into a mostly full DEF tank or add then top up with DEF; some vehicles require a filling adapter or funnel. If a warning light persists after about 250 miles, a second application or mechanical inspection may be necessary.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCars\/Small SUVs (3–5 gal DEF tank): use about 1\/2 bottle.\u003c\/li\u003e\n  \u003cli\u003eLight Trucks\/Mid‑to‑Large SUVs (5–9 gal): use full bottle.\u003c\/li\u003e\n  \u003cli\u003eMedium\/Heavy Duty Trucks (10–20 gal): use two bottles per treatment.\u003c\/li\u003e\n  \u003cli\u003eAlways add to DEF tank, never to the diesel fuel tank; follow manufacturer filling adapters as needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill using Rislone DEF Crystal Clean affect my vehicle warranty or other emissions equipment?\u003c\/h3\u003e\n\u003cp\u003eRislone designs DEF Crystal Clean to be safe for vehicles with DOC, DPF, SCR, ASC ammonia slip catalysts and similar systems; it will not void new vehicle warranties when used as directed. The product is formulated to be compatible with a wide range of urea-based fluids and branded systems to avoid adverse reactions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSafe with AdBlue, AUS 32, ARLA 32, BlueTEC, BlueHDi and most DEF brands.\u003c\/li\u003e\n  \u003cli\u003eDoes not interfere with DOC catalytic converters or particulate filters when used correctly.\u003c\/li\u003e\n  \u003cli\u003eIntended for the DEF\/AdBlue tank only—follow vehicle-specific filling procedures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow often should I use DEF Crystal Clean to maintain SCR performance?\u003c\/h3\u003e\n\u003cp\u003eRegular treatments help prevent re‑crystallization and preserve system efficiency. For preventative maintenance, applying the cleaner at recommended service intervals keeps buildup from returning and reduces the chance of SCR-related derates or limp-mode events.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUse every 5,000 miles as a maintenance interval for vehicles prone to crystallization.\u003c\/li\u003e\n  \u003cli\u003eApply whenever white crystal deposits are observed or SCR warnings appear.\u003c\/li\u003e\n  \u003cli\u003eMore frequent application may benefit vehicles driven at low speeds, with frequent stops, or under light loads.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Rislone 4784 DEF Crystal Clean is intended for diesel vehicle owners, fleet managers and technicians who want a DEF-compatible cleaning solution to remove urea crystallization and maintain SCR system performance. It is especially useful for vehicles that spend a lot of time at low speed, carry varying loads, make frequent stops, or operate in conditions that accelerate DEF crystallization. Follow vehicle manufacturer guidance and the product dosing instructions when treating light trucks, SUVs, passenger cars and medium to heavy duty diesel trucks.\u003c\/p\u003e\n\u003ch3\u003eIngredients\u003c\/h3\u003e\n\u003cp\u003eProprietary\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I add DEF Crystal Clean to my diesel fuel tank?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. Add only to the DEF\/AdBlue tank (usually blue cap). Do not put this product in the diesel fuel tank.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How long until I see results after adding the cleaner?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Drive about 250 miles or a few days of normal operation; if faults persist, a second treatment or mechanical check may be needed.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Rislone","offers":[{"title":"Default Title","offer_id":67591064223929,"sku":"B0CRSY78LR","price":63.09,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/rislone-def-crystal-clean-front-packaging.jpg?v=1790540418","url":"https:\/\/redleafauto.ca\/products\/rislone-def-crystal-clean-diesel-def-scr-emission-system-cleaner-1-pack-dissolves-urea-crystals-def-compatible","provider":"Redleaf Auto","version":"1.0","type":"link"}