Hot Shot's Secret - Premium DEFender

Worried about DEF crystal buildup and costly SCR system repairs? Protect your diesel engine with Hot Shot’s Secret Premium DEFender, a powerful formula engineered to clean and prevent harmful DEF crystals from forming inside your SCR system. These deposits can reduce performance, increase fuel consumption, and lead to expensive downtime if left untreated.

Premium DEFender works throughout the entire SCR system! Protecting the injector, sending unit, DEF tank, and more. Triple-filtered for purity and free of ash and dyes, it’s fully compatible with all DEF brands and safe for all SCR-equipped diesel engines, including cars, trucks, semis, and equipment. Using it each time you refill DEF helps prevent white crystallization deposits from forming and keeps your system running smoothly.

By maintaining clean DEF and preventing crystal formation, Premium DEFender helps restore proper DEF nozzle spray patterns, protects against freeze-related issues, and may help clear common SCR/DEF trouble codes like P20EE, P20EF, P204F, P207F, P20E8, and P218F. 

Treatment Plan

Maintain optimal performance or address existing crystal buildup.

• 8 oz treats 20 gallons of DEF
• Squeeze 1 oz per 2.5 gallons of DEF and pour directly into the DEF tank or DEF cube when refilling
• Do not exceed the recommended dosage. Only add to DEF/AdBlue, never to diesel fuel