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Updated: 08 Oct 2025

10 Best Radiator Cleaner Fluids

#1
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THERMOCURE, Non-Acidic Radiator De-Rusting Agent & Cooling System Flush

Brand: Rust Medic
$87.95
⭐ 4.1
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    THERMOCURE CURES ENGINE OVERHEATING BY REMOVING THE RUST FROM YOUR COOLING SYSTEM!
  • THERMOCURE restores the ability to transfer heat to the coolant allowing engines to run cooler and last longer.
  • THERMOCURE removes rust scale and deposits from the radiator, water pumps, water jackets, and engine blocks and heads.
  • "Non-toxic, Biodegradable, Non-corrosive, Safe on skin and eyes, No fumes or bad odours and contains no acids, bases, solvents, or VOCs
  • THERMOCURE Uses the latest technology in rust and corrosion removal to totally revitalize automotive cooling systems.
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#2
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Nulon General Purpose Coolant Premix 4 Litre, Red

Brand: Nulon
$28.73
⭐ 4.6
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    Anti-freeze and Anti-boil protection 4 years or 200,000km
  • Contains long life inhibitor technology for corrosion protection of all cooling system metals
  • Ready to use and suitable for a wide range of vehicles in Australia and New Zealand
  • Protects aluminium, steel, cast iron, solder, copper and brass
  • Provides maximum protection against cavitation damage and cylinder liner pitting
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#3
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Radiator Cleaning Wand,Water & Air Cleaning Wands for High Efficiency Cooling Systems and Radiators,24'' Radiator Flush and Cleaner for Automotive Radiators, Condensers, HVAC & Heavy Machinery B

Brand: Generic
$18.70
⭐ 5
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    Slim Design for Hard-to-Reach AreasThe ultra-flat wand head easily fits into tight spaces under vehicles or between coils, reaching areas standard tools miss. Works with most pressure washers for versatile cleaning.
  • Powerful & Efficient CleaningRadiator cleaning wand utilizes advanced descaling technology to deep clean water tanks and condenser radiators, effectively removing scale, rust, and dirt buildup. Restores equipment to peak performance for optimal cooling and efficiency.
  • Heavy-Duty Stainless Steel BuildBuilt to last with corrosion-resistant stainless steel and solid metal fittings. Resists rust, cracks, and wear, even in rugged environments like construction sites or auto repair shops.
  • No Disassembly NeededSaves time and effort! Cleans thoroughly without dismantling parts. Perfect for quick maintenance of home AC units, automotive radiators, or heavy-duty machinery.
  • Easy to UseUniversal 1/4 quick connect fits most pressure washersattach in seconds and start cleaning!
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#4
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Plasma Table Green Cutting Fluid Powder & Radiator Repair Test Tank Cleaner - 12 Bags, 12 Oz Each, 144 Oz Total - Green Fluorescent Dye for Leak Detection - Made in USA

Brand: AM WORLDWIDE
$239.34
⭐ 4.2
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    Bulk Plasma CNC Cutting Fluid & Radiator Test Tank Cleaner: Ideal for large-scale operations, designed to enhance the performance of radiator test tanks and CNC plasma cutting table fluid.
  • Neutralizes Acid & Clears Water: Effectively raises pH levels to neutralize acid and removes solids, ensuring clean and optimized water cutting fluid for metal drilling and radiator repairs.
  • Enhanced Leak Detection with Green Fluorescent Dye: Safe, fluorescent dye amplifies light around air bubbles, making leaks easier to detect in both plasma cutting fluids and radiator systems.
  • Reduces Corrosion and Rust: Minimizes corrosion and rust formation in tanks, tools, and radiators, extending their lifespan and ensuring long-term performance.
  • Economical Bulk Package: Each 12-ounce bag can make up to 300 gallons of solution, with 12 bags included you can treat up to 3,600 gallons. Proudly MADE IN THE USA.
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#5
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LEAK SAVER HVAC Guys Foam Blaster - Foaming AC Coil Cleaner for Air Conditioner and Refrigeration Units - No Rinse Evaporator Coil Cleaner Condenser Coil Cleaner - Citrus Scent

Brand: Leak Saver
$46.00 ($9.02 / 100
⭐ 5
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    HVAC PROFESSIONAL FORMULA: Field tested and used by fellow HVAC professionals. Foam Blaster air conditioner cleaner penetrates coils with high pressure spray foam. The delayed foaming action liquifies grime and deodorizes dirty coils and drain pans.
  • POWERFUL EXPANDING FOAM ACTION: Expanding foam cleaner penetrates coils with high pressure cleaning spray for effective and thorough deep cleaning. Deodorize and clean with a mild citrus scent. Perfect for restoring efficiency to outdoor cooling units.
  • MULTI FOAM CLEANER: Made for both evaporators (no rinsing required) and condensers (light rinsing with water required). When using on evaporators, the condensate water from the unit in operation rinses off the dirt and product.
  • MULTIPURPOSE FORMULA: Foam Blaster is designed for all cooling equipment including HVAC units, refrigeration systems, automotive radiator, fan blades, metal filters and more! Liquify grime and deodorize with our heavy duty foam sprayer.
  • AC CLEANER FOAM: We stand behind the quality of our products. If for any reason you are not satisfied with your order, reach out to us directly and we will make it right with our satisfaction guarantee.
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#6
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Royal Purple 01600 Purple Ice Super-Coolant Radiator Additive - 12 oz.

Brand: Royal Purple
$39.85
⭐ 5
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    2-in-1 corrosion inhibitor and wetting agent enhanced protection of aluminum
  • Reduces surface tension of coolant allowing heat to transfer outside the radiator for more horsepower
  • Reduces hot spots in the engine and cylinder heads to help prevent failure of critical engine components
  • Maintains a cleaner system, prevents overheating and extends the life of the water pump
  • Safe to use in water or anti-freeze/water blends
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#7
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Chemtech Aircon Kleen Air Conditioner Cleaner, 150 g

Brand: Chemtech
$23.00 ($15.33 / 100
⭐ 4.2
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    Quick and easy to use, one application per treatment
  • Eliminate odours fast
  • Disinfect your air conditioning system
  • Fresh citrus scent, australian made
  • Formulated to deodorise and disinfect the heating, ventilation and air conditioning system
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#8
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Radiator Flush and Cleaner | 350ml Radiator Cleaning Fluid | Cooling System Cleaner, Mild Car Radiator Cleaner, Car Radiator Flush Cleaner for Car Radiator, Truck

Brand: Generic
$17.19
⭐ 4.4
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    Cleaner Cooling System: Our car water tank cleaner effortlessly removes scale, rust, and other deposits, restoring your cooling system's cleanliness. Enjoy better coolant circulation and increased efficiency of your engine.
  • Increase Protection: Protect your car's cooling system from water leakage and performance deterioration caused by rust with our cleaner that prevents further rust and scale buildup.
  • Advanced Solution: With our Car Water Tank Cleaner, regular cleaning ensures improved heat dissipation efficiency and component extension. Prevent rust and corrosive for better engine durability and performance.
  • Safe and Powerful Cleaning: Our car water tank cleaner is designed with neutral formulation that can effectively and safely remove dirt from the tank and engine without causing any erosion to the vehicle's components.
  • Enhances Car Cooling: Boosts the car's power and efficiency by cleaning the water tank and preventing overheating issues. Helps to reduce engine temperature and improve cooling performance.
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#9
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Car Radiator Coolant Fluid making Formulas: Car coolant anti freezing and anti scale additive Making formulations

Brand: No Brand
$40.91
⭐ 5
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    No features listed
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#10
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Nulon Radiator Flush and Clean 300 ml

Brand: Nulon
$15.95
⭐ 4.2
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    Cleans fast in 20 minutes
  • Reduces overheating, no pre-mixing
  • Safe to use with all coolant types
  • Neutralises harmful acids
  • Reduces mineral scale and sludge
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