Top 7 Radiator Flush Kit – Cooling System Additives

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1. Prestone


Prestone Pack of 1 AF Flush 'N Fill Kit

Prestone #ad - Professionally back-flushes cooling systems of most cars and light trucks. Easily installs antifreeze/coolant in minutes. Prevents potential overheating and engine damage. Allows you to flush the complete cooling system, not just the radiator, in one easy process. Removes rust and dirty coolant that that can lead to a clogged radiator.
BrandPrestone #ad
ManufacturerPrestone #ad
Height2 Inches
Length9 Inches
Weight0.25 Pounds
Width9 Inches
Part NumberAF-KIT
WarrantyAs labelled



EPAuto Spill Proof Radiator Coolant Filling Funnel Kit

EPAUTO #ad - 5” extension bar and 45° Elbow allow access to caps under shrouds or at an angle. Cooling system fill kit prevents spills and trapped air. Allows color matching of caps for dedicated adapters. Trapped air pockets may cause erratic cooling system and heater performance. Uspto patent no: us20180155175.
BrandEPAUTO #ad
ManufacturerEPAuto #ad
Part NumberAQ-001-1



And Test Heating Core Lines for Leaks | Universal Adapters to Fit Most Radiator Necks and Coolant Reservoirs, OEMTOOLS 24444 System Refiller Kit, 5 Eliminate Trapped Air

OEM TOOLS #ad - Discover leaks: it’s easy to check for leaks while under vacuum; if your vacuum level decreases while all valves are off, you have a leak in your system.

Easy complete coolant system refiller: Refills the entire cooling system including the Heater Core. Huge time saver: eliminate time consuming bleeding and purging, and completely remove all trapped air from your cooling system; Removing air through a radiator burp is much more time intensive. Widely useful: comes with five adapters that fit most common radiator necks and coolant reservoirs. Simple to use: all you need to use this coolant system vacuum kit is a shop air compressor; The included venturi valve turns any air compressor input into a strong vacuum force.
BrandOEM TOOLS #ad
ManufacturerOEM Tools #ad
Height5.04 Inches
Length11.73 Inches
Weight4.61 Pounds
Width11.97 Inches
Part Number24444
WarrantyOEMTOOLS Limited One Year

4. Prestone


Prestone AS105-6PK Radiator Flush and Cleaner, 22 oz, Pack of 6

Prestone #ad - Strong enough to help restore maximum cooling system efficiency. Non-toxic, non-acidic formula is easy-to-use and safe for all cooling system metals. 2-in-1 formula designed for light flushing and heavy-duty cleaning. Cleans cooling systems to help prevent overheating. Effectively removes heavy deposits by drawing metal oxides into the solution.
BrandPrestone #ad
ManufacturerPrestone #ad
Weight10.21 Pounds
Part NumberAS105-6PK

5. ABN


ABN Coolant Funnel Kit Radiator Spill Free Funnel Auto Coolant Flush Kit No Spill Funnel Radiator Funnel Fill Kit

ABN #ad - Fits your vehicle: antifreeze funnel kit works on any vehicle filled through the radiator not the expansion tank; The included straight extension and 45-degree elbows allow access to caps located under shrouds or in fender wells; Works in any hard-to-reach area and can be combined to use on radiator caps that are placed at an angle.

Perform tests & refill fluids: the abn | cooling system refiller kit coolant burping funnel radiator Flush Kit prevents squeaky belts and spills when changing radiator coolant, vacuum filling, flushing systems, or replacing hoses; Connects to radiator and seals for hands-free work so you can fill fluid level higher than radiator allows for coolant expansion to remove trapped air pockets or head gasket combustion leak bubbles that can otherwise cause cooling system errors and heater issues. Package contents: coolant vacuum refill kit includes 1 radiator burp funnel with detachable lid to keep the car radiator funnel clean and other contents organized, 5 caps, one 5-inch/12.

7cm long straight, 3 adapters two 45-degree elbow, and 2 clear tubing extras 4-inch x 6mm OD / 4mm ID. Easy to use: insert appropriate adaptor and cap on your radiator, place funnel plug into funnel neck, place funnel in adapter, squeeze radiator hose, with engine running allow trapped air to escape through funnel, insert stopper, remove funnel and fluid, transfer remaining fluid to a container or overflow reservoir; If using funnel lid – allow fluids cool to ambient temperature, add your coolant, drain captured fluid into a container, replace cap on the now air-free radiator. Built to last: 6. 75-inch x 8. 25-inch 17.
BrandABN #ad
ManufacturerABN #ad
Height7.75 Inches
Length8.75 Inches
Weight1.6 Pounds
Width6.8 Inches
Part Number0999

6. Valvoline


Valvoline ZXC01 Radiator Flush

Valvoline #ad - Quickly flushes accumulated sediment and corrosion from radiators. Restores cooling system efficiency by removing light rust, scale and oily residue. For hard to remove corrosion deposits, use ZEREX Super Cleaner. For use on light corrosion deposits removal. Can be used on all cooling system metals, including aluminum.
BrandValvoline #ad
ManufacturerValvoline #ad
Height7.38 Inches
Length4.5 Inches
Width7.88 Inches
Part NumberZXC01

7. Gunk


Gunk Motor Medic C1412 10-Minute Radiator Flush, 11 oz.

Gunk #ad - Motor medic is a local family owned company based out of charlotte, has earned the trust of hard-working tradesment and the active DIYer through consistent, liquid wrench products, NC. For more than 75 years, developed by the people who use them, superior performance and a commitment to innovation. Motor medic.
BrandGunk #ad
ManufacturerNiteo Products #ad
Height5.69 Inches
Length2.72 Inches
Weight0.81 Pounds
Width2.72 Inches
Part NumberC1412