Hot Shot’s Secret Premium DEFender is a targeted DEF additive designed to clean, protect, and restore the performance of SCR emissions systems in semis and other DEF-equipped diesel equipment. DEF crystallization can lead to fault codes, derates, downtime, and costly repairs that keep trucks off the road. Premium DEFender is formulated to help prevent and eliminate crystallization buildup in DEF injectors and lines while restoring proper DEF spray patterns. Use just one ounce per 2.5 gallons of DEF; one 16-oz bottle treats 40 gallons.  

Features:

• With regular use, helps maintain SCR system efficiency
• Can help address common DEF-related trouble codes, including P20EE, P204F, and P207F
• Compatible with all DEF brands
• Formulated for use in all SCR-equipped diesel engines