Best Coolant Flush Product in 2022 [*Top Picks*]

Looking for the best coolant flush product on the market? We’ve got you covered. Check out our ratings of absolute bestsellers below and make a final decision.

5878 Reviews Scanned

  • Evapo-Rust TC001 Thermocure Coolant System Rust Remover – 32 oz., Rust Remover for Cars Engines, Water Pumps, Radiators | Automobile Cleaning Solutions
    Bestseller #1
    Evapo-Rust TC001 Thermocure Coolant System Rust Remover – 32 oz., Rust Remover for Cars Engines, Water Pumps, Radiators | Automobile Cleaning Solutions (386)
      EVAPO-RUST RUST REMOVER: Evapo-Rust effortlessly removes rust from automotive parts, hardware, tools, cookware, and antiques without any scrubbing or sanding. THERMOCURE FORMULA: Thermocure is made of a non-toxic and water-based solution that is easy-to-use on automotive cooling systems. It is non-corrosive and non-flammable. EASY APPLICATION: This non-toxic, non-flammable solution removes rust that causes overheating in three easy steps. Treats cooling systems up to 3 gallons. USE: The cooling system cleaner removes rust from the cooling system in three easy steps that include draining the coolant, adding the solution and topping off with water, let the solution stay in the car for 3-4 hours up to several days. Drain the cooling system and flush 3-4 times with water. Refill with manufacturer's recommended coolant. SPECIFICATIONS: Our Thermocure cleaner is available in a 32 oz bottle.
  • ABN Coolant Funnel Kit Radiator Spill Free Funnel Auto Coolant Flush Kit No Spill Funnel Radiator Funnel Fill Kit
    Bestseller #1
    ABN Coolant Funnel Kit Radiator Spill Free Funnel Auto Coolant Flush Kit No Spill Funnel Radiator Funnel Fill Kit (16866)
      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, flushing systems, vacuum filling, 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 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 BUILT TO LAST: 6.75-inch x 8.25-inch (17.1cm x 21cm) overall with 0.75-inch (1.9cm) outside diameter (OD) coolant fill funnel tip that securely fits the included adapters of different sizes; While there are no measurement markings on the coolant spill free funnel, it can hold a maximum of approximately 70 ounces (2.1 L); Constructed from opaque yellow hard-plastic components; 3 out of 5 cap adaptors include steel rings to hold the adaptors in place 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, (3) adapters (two 45-degree elbow, one 5-inch/12.7cm long straight), 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 in adapter, add your coolant, with engine running allow trapped air to escape through funnel, squeeze radiator hose, insert stopper, transfer remaining fluid to a container or overflow reservoir; If using funnel lid – allow fluids cool to ambient temperature, place funnel plug into funnel neck, remove funnel and fluid, drain captured fluid into a container, replace cap on the now air-free radiator
  • Smilyeez BG Products 6830 Cooling System Flush Coolant Service Kit BG Universal Cooling System Cleaner PN 540 & BG Universal PN 546
    Bestseller #1
    Smilyeez BG Products 6830 Cooling System Flush Coolant Service Kit BG Universal Cooling System Cleaner PN 540 & BG Universal PN 546 (81)
      Remove rust, scale and sludge from cooling system. Improves cooling system function. Extends coolant life. Reduces the chance of overheating. Can extend the life of cooling system components.
  • WaterAce WA56UP Submersible Utility Pump, 1/3 HP, Black
    Bestseller #1
    WaterAce WA56UP Submersible Utility Pump, 1/3 HP, Black (386)
      Designed for numerous residential uses including flooded basements, window wells, spas, cisterns, sumps, and flooding in low lying areas Continuous duty, efficient 115V PSC (permanent split capacitor) motor for lower Carbon footprint; higher efficiency using less energy to operate Made of corrosion resistant thermoplastic for long life Download the user manual under the technical specification section of this page for safety, installation, troubleshooting, and information Click on the Water Ace products link at the top of this page to see more pump options from Water Ace products
  • Prestone AS105 Total Cooling Syststem Cleaner for Radiator, Heater Core, and Hoses, 22 oz., 1 pack
    Bestseller #1
    Prestone AS105 Total Cooling Syststem Cleaner for Radiator, Heater Core, and Hoses, 22 oz., 1 pack (386)
      2-in-1 formula designed for light flushing and heavy-duty cleaning Cleans cooling systems to help prevent overheating Non-toxic, non-acidic formula is easy-to-use and safe for all cooling system metals Effectively removes heavy deposits by drawing metal oxides into the solution Strong enough to help restore maximum cooling system efficiency
  • OEMTOOLS 87009 No-Spill Coolant Funnel Kit, Near Universal Fitment, Translucent, 15 Piece Set, Cooling System Funnel Allows Access To Hard-To-Reach Radiators
    Bestseller #1
    OEMTOOLS 87009 No-Spill Coolant Funnel Kit, Near Universal Fitment, Translucent, 15 Piece Set, Cooling System Funnel Allows Access To Hard-To-Reach Radiators (242)
      SPILL FREE FUNNEL: Our coolant filler kit funnels automotive fluids, such as radiator coolant and oil, cleanly into any vehicle; the long burp funnel prevents spills and trapped air during refills after a coolant flush ULTIMATE MULTI-VEHICLE FUNNEL KIT: 4 cap adapters, 5 filler neck adapters, 3 extensions, a stopper, and a high quality transparent coolant funnel form a funnel kit more complete than others NEAR UNIVERSAL FITMENT: This spillfree funnel is ideal for an engine flush, a coolant pressure tester kit, even for a radiator flush; Coolant refill kit features near-universal fitment for American and foreign vehicles ADAPTERS INCLUDED: With the exceptional number of included adapters, OEM TOOLS delivers a spill free funnel kit that works better than just any old radiator fill funnel or coolant filling kit with a coolant funnel adapter PROTECT YOUR VEHICLE: Funnel automotive fluids, or combine with antifreeze tester kit to ensure your system stays clean and functional; Spill proof funnel kit includes a fluid stopper, which means no spills or air bubbles
  • BlueDevil Radiator Flush
    Bestseller #1
    BlueDevil Radiator Flush (386)
      Extends Vehicle Life Advanced Cleaning Power Concentrated Formula
  • BlueDevil Products BlueDevil 00203 Radiator Flush & Oil Degreaser - 32 Ounce,Gray
    Bestseller #1
    BlueDevil Products BlueDevil 00203 Radiator Flush & Oil Degreaser - 32 Ounce,Gray (386)
      Product Type: Auto Accessory Package Quantity: 1 Country Of Origin: United States Package Dimensions: 14.375" (L) x 5.687" (W) x 8.875" (H)
  • Irontite ThoroFlush (468-9110-16)
    Bestseller #1
    Irontite ThoroFlush (468-9110-16) (8318)
      Industrial Strength concentrated radiator, engine coolant system and fuel tank cleaner Loosens and removes rust, scale, grease, oil and sludge Cleans Auto, HD Truck and Equipment Cooling Systems Safe for use on Cast Iron, Aluminum or Plastic
  • EPAUTO Spill Proof Radiator Coolant Filling Funnel Kit
    Bestseller #1
    EPAUTO Spill Proof Radiator Coolant Filling Funnel Kit (39081)
      Allows color matching of caps for dedicated adapters. Cooling System fill kit prevents spills and trapped air. Trapped air pockets may cause erratic cooling system and heater performance. 5” Extension Bar and 45° Elbow allow access to caps under shrouds or at an angle. USPTO Patent No: US10519019B2
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