That’s *CAT Cooling System Cleaner - Quick Flush* — OEM grade radiator flush from Caterpillar.
*What it’s for:*
This is used to flush and clean the entire cooling system before refilling with new coolant.
1. *Descaling* - Removes lime, scale, rust, and "bolder bloom" buildup inside radiators, blocks, and water jackets
2. *Quick Flush* - 50 minute treatment. No need for long soak times
3. *OEM Approved* - CAT spec. Used by workshops, generator service companies, and fleet operators servicing CAT engines, trucks, and heavy equipment
4. *One-step* - Drain old coolant, add this + water, run 50 mins, drain, refill