Cat® ELC incorporates an advanced technology with organic acid corrosion inhibitors for maximum copper, solder, brass, steel, cast iron, and aluminum. protection. Lowers maintenance costs by eliminating the need for supplemental coolant additives, extends coolant change-out intervals, and reduces disposal requirements. Cat ELC is recommended in most Cat machine engine and machines. Do Not Add Water to dilute. The CC2638EDJ ensures optimal performance and durability. Designed for efficiency and longevity. Perfect for heavy-duty applications, ensuring maximum efficiency. This Cooling System Cleaner Restore Plus Fleetguard CC2638EDJ (5L) by Caterpillar is built to last.