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Cooling System Additives

64 cooling system additives from PrimoChill, Mayhems, Kingpin Cooling and more.

Recommended Cooling System Additives

ACDelco
+Tracer dye helps locate engine cooling system leaks
+Bottle holds 1 oz of dye per container
+Sold as a GM original equipment cooling system product
−Only 1 oz, which treats a single small dosing
No price recorded yet.
Bar's Leaks
+Four-pack gives four 16.9 oz bottles in one set
+Formulated for high mileage cooling system repair
+Named to stop coolant leaks and restore performance
−Repair treatment is intended for leak-prone systems only
No price recorded yet.
EK
+Concentrate cleans PC liquid cooling loops
+Bottle holds 250 ml of concentrate
+Designed for PC coolant loop cleaning
−Requires dilution before use in a loop
No price recorded yet.
Errecom
+UV dye helps detect radiator and cooling system leaks
+Dye is designed for coolant leak detection
+Container holds 0.34 fl oz of dye
−Only 0.34 fl oz, a very small amount of dye
No price recorded yet.
Leakfinder
+Green dye helps locate coolant leaks in radiators and hoses
+Covers radiators, hoses, heater cores and water pumps
+1 oz bottle is a small amount for dye use
−Only 1 oz of dye per bottle
No price recorded yet.
LK-128
+Rated at 128W/mK for high thermal conductivity
+Metal-based compound suited to high-heat components
+1g quantity for a small application
−Metal-based paste can conduct electricity if it spreads
No price recorded yet.
PrimoChill
+32 oz bottle of computer watercooling coolant
+Visual flow formula for a solid, non-transparent look
+Full protection coolant paired with PrimoPrep
−Non-transparent fluid hides the components behind the loop
No price recorded yet.
Rustins
+Two 500ml containers in one pack
+Quick drying radiator enamel formula
+Pack of 2 covers more than one job
−Not a coolant additive, it is a paint for radiators
No price recorded yet.
Thermal Grizzly
+Liquid metal thermal compound for CPU heat transfer
+Made in Germany per the product name
+Includes 5 gram combo for PS5 use
−Metal-based compound requires careful application to avoid short circuits
No price recorded yet.
Thermal Grizzly
+6 gram quantity of thermal paste
+Designed for maximum thermal conductivity
+Extremely high performance thermal paste formulation
−Thermal paste rather than a coolant additive for engine cooling systems
No price recorded yet.
Thermal Hero
+5 gram metal alloy formula
+Metal alloy composition for high thermal transfer
+Listed for PS5, CPU, GPU and Xbox use
−Metal formula is electrically conductive, so it needs careful application
No price recorded yet.
Wynn's
+325ml capacity for radiator leak treatment
+Stop leak formula for radiator repairs
+Simple single bottle for one treatment
−Stop leak products can clog small passages in the cooling system
No price recorded yet.
XADO
+250ml capacity for radiator leak repair
+Stop leak formula to seal radiator leaks
+Restores radiator fluid level and fixes leaks
−Stop leak additives can restrict flow in narrow coolant passages
No price recorded yet.
Yollky
+Black coolant filler neck part
+Also fits Elantra GT per the product name
+Part number 25329-F2000 identifies the fitment
−Fits only the Hyundai models and years listed
No price recorded yet.
Brodys
+Kit cleans the auto A/C evaporator coil
+Targets odor in the auto A/C and heater system
+Designed to clean the air conditioning system
No price recorded yet.
Fleetguard
+Fleetguard DCA60L coolant additive for diesel engines
+Bottle holds 16 oz of additive
+Made by Cummins Filtration, an engine filtration maker
No price recorded yet.
Design Engineering
+Added to engine coolant for water-to-air intercoolers
+Suited to auto turbo and supercharger cooling
+Bottle holds 16 oz of additive
No price recorded yet.
Design Engineering
+Engine coolant additive for cars, trucks, RVs and motorcycles
+Bottle holds 16 oz of coolant additive
+Works across several vehicle types
No price recorded yet.
EK
+Concentrated superflush for PC cooling loops
+Bottle holds 250 ml for rinsing and prepping a loop
+Pink concentrate for flushing PC coolant systems
No price recorded yet.
EK
+Premixed coolant for PC liquid cooling loops
+Bottle holds 1000 ml of ready-to-use coolant
+Indigo violet premix for PC cooling systems
No price recorded yet.
Featrity
+Three-pack gives three cans of foam cleaner
+Foam formula is designed to reach evaporator coils
+Removes odors at the source according to the product name
No price recorded yet.
Ford
+Genuine Ford branded diesel cooling system additive
+Two 16 oz bottles in one pack
+Designed for diesel cooling system maintenance
No price recorded yet.
Irontite
+Three-pack includes Thoro-Flush, All Weather Seal, and Ceramic Motor Seal
+Thoro-Flush is intended for flushing the cooling system
+Ceramic Motor Seal targets leaks in the engine
No price recorded yet.
K-Seal
+16 oz pour-and-go bottle for direct addition to the system
+Designed to repair blown head gaskets and cracked heads
+Also targets engine blocks according to the product name
No price recorded yet.
K-Seal
+Pour-and-go design requires no special tools
+Mixes with all antifreeze types
+No flushing required before use
No price recorded yet.
Mayhems
+Hades Plus formula added to a PC liquid cooling loop
+15 ml bottle sized for a single loop dose
+Described as complete system protection for liquid cooling
No price recorded yet.
Red Line
+Two 12 ounce bottles in one pack
+Super coolant formula for engine cooling systems
+Wetting agent designed to improve heat transfer
No price recorded yet.
TSI Supercool
+One quart bottle
+Contains UV dye for leak detection
+Formulated for electric vehicle cooling systems
No price recorded yet.

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