HDF
Heavy Duty Flush
Targets thermally degraded and burnt glycol contamination, commonly called the Black Death.
Ready to Use · 168–336 Hours View HDFRoyal Flush
Cooling System Restoration Technology
The Royal Flush Program
Five specialized chemical flushes designed for five different internal cooling system conditions. The correct treatment is selected from coolant analysis data, contamination type, system history, and field verification.
The Right Chemistry for the Condition
There Is No Universal Cooling System Flush
Burnt glycol, spent coolant, severe oil contamination, phosphate contamination, and rust are different problems. Each requires chemistry designed for that specific condition.
The Royal Flush Program is diagnosis driven. Laboratory results and supporting information determine whether the system needs HDF, PMF, OCF, PO4FIX, RRF, or one approved two-product sequence.
Using more chemical does not create a better result. The objective is to apply only the treatment required, follow the correct procedure, verify the system, and restore clean heat-transfer surfaces.
Cooling System Restoration 101
See the Royal Flush Program
Learn how targeted internal cooling system cleaning fits into a complete restoration and maintenance strategy.
Five Specialized Flushes
Select a Product to Learn More
Each Royal Flush product targets a defined cooling system condition. Product selection should be supported by coolant analysis and system history.
PMF
Preventive Maintenance Flush
Targets spent coolant, silicate dropout, mild oil residue, and preparation for a coolant-type change.
Mix 1:1 · Run 7–14 Days View PMF
PO4FIX
Phosphate Fix
Targets phosphate contamination and rust associated with improper detergents, degreasers, or coolant chemistry.
Ready to Use · 4 Hours at Temperature View PO4FIX
RRF
Rust Removal Flush
Targets internal rust and corrosion deposits that restrict coolant circulation and insulate heat-transfer surfaces.
Ready to Use · 2 Hours at Temperature View RRF
OCF
Oil Contamination Flush
Targets severe oil contamination and oil-coolant emulsions following an oil cooler, gasket, or component failure.
Ready to Use · 4 Hours at Temperature View OCFTreatment Discipline
Three Rules Protect the Process
The program uses the fewest products necessary to correct the confirmed condition.
Diagnose Before Treating
Use coolant analysis, system history, field observations, and mechanical verification to identify the contamination before selecting a flush.
Two-Product Maximum
Approved combination procedures contain no more than two Royal Flush products. Follow the published sequence exactly.
Do Not Mix Incompatible Paths
HDF is never paired with PMF. OCF is never paired with PMF. HDF pairs only with RRF or PO4FIX when the report supports the second treatment.
Published Treatment Paths
Possible Flush Combinations
Match the confirmed system condition to the applicable product or published two-product procedure.
System Condition
Treatment Path
Procedure
Important:
This chart is a treatment reference, not a substitute for coolant
analysis, OEM requirements, mechanical inspection, or the published
field procedure. Never combine products outside the approved treatment
paths.
Collect · Understand · Recommend · Execute
Let C.U.R.E. Identify the Treatment Path
Upload a coolant analysis report to convert laboratory results into explained findings, system condition, a specific Royal Flush recommendation when required, and the correct field execution procedure.
Zero Hour Cooling System Restoration
Diagnose the Condition. Apply the Correct Chemistry.
The Royal Flush Program is the internal cleaning stage of a complete cooling system restoration strategy supported by enhanced coolant analysis, external cleaning, correct refill practices, and continued quarterly testing.