BrandList

Top Cooling System Performance Additives

The best Cooling System Additives includes K-Seal Permanent Coolant Leak Repair [8oz], K-Seal [ST3501] Head Gasket Sealer, 16oz, ACDelco Engine Cooling System Dye [10-5057] and many others as mentioned below.

1

K-Seal Permanent Coolant Leak Repair [8oz]

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Brand: K-Seal
  • Permanent coolant leak repair in minutes.
  • Seals leaks in radiators and head gaskets.
  • One-step application; no draining needed.
  • Compatible with all antifreeze types.
  • Trusted by mechanics for reliable performance.
  • Easy to use: shake, pour, and go.
  • Cost-effective solution for engine coolant leaks.
  • Average Rating out of 5:
  • Price Range: $10.97
  • Material: Plastic

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Price: $10.97
2

K-Seal [ST3501] Head Gasket Sealer, 16oz

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Brand: ‎K-Seal
  • Permanently repairs blown head gaskets and cracked blocks.
  • Advanced formula offers 33% more sealing power.
  • Seals leaks up to 0.64mm in size.
  • Easy to use: shake, pour, and go.
  • Compatible with all coolant types and engine materials.
  • Professional-grade reliability trusted by mechanics worldwide.
  • Cost-effective solution for engine performance enhancement.
  • Average Rating out of 5:
  • Price Range: $22.99

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Price: $22.99
3

ACDelco Engine Cooling System Dye [10-5057]

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Brand: ‎ACDelco
  • Quickly identifies leaks in coolant systems.
  • Fluorescent dye for easy visual detection.
  • Simplifies leak detection process.
  • Reduces labor time and costs.
  • Compatible with traditional coolant systems.
  • 1 oz bottle for convenient use.
  • Essential for efficient vehicle maintenance.
  • Average Rating out of 5:
  • Price Range: $11.43

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Price: $11.43
4

SMART JERRY - No-Spill Coolant Bleeder Kit

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Brand: ‎SMART JERRY
  • Translucent body with clear measurement scale.
  • Holds up to 77 oz (2.3L) coolant.
  • Eliminates trapped air for efficient cooling.
  • Includes 5 adaptors and 4 caps.
  • Access caps under shrouds with extension tubes.
  • Equipped with shut-off valve for easy control.
  • No-spill design ensures a clean work area.
  • Average Rating out of 5:
  • Price Range: $19.98
  • Material: Plastic

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Price: $19.98
5

Chrysler Limited Slip Additive [4 oz]

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Brand: ‎Chrysler
  • Genuine OEM Mopar limited slip additive.
  • Enhances performance of limited slip differentials.
  • 4 oz. bottle for convenient usage.
  • Ensures smooth and quiet operation.
  • Compatible with Chrysler and Dodge vehicles.
  • Prevents chatter and slipping during turns.
  • Meets factory specifications for quality assurance.
  • Average Rating out of 5:
  • Price Range: $15.00
  • Material: Synthetic

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Price: $15.00
6

Subaru OEM Coolant System Conditioner [SOA635071]

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Brand: ‎Subaru
  • Genuine Subaru OEM product for reliability.
  • Prevents corrosion in cooling system effectively.
  • Specifically formulated for Subaru vehicles.
  • Enhances overall engine performance and longevity.
  • Easy to use with clear instructions included.
  • Helps maintain optimal coolant flow.
  • Compatible with all Subaru models.
  • Average Rating out of 5:
  • Price Range: $7.45

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Price: $7.45
7

SEDY Spill-Proof Radiator Coolant Funnel Kit

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Brand: SEDY
  • Spill-proof design for clean coolant refilling.
  • Fluid stopper prevents drips and air bubbles.
  • Universal compatibility with various vehicle models.
  • Includes adapters for GM and Ford brands.
  • Durable materials for long-lasting performance.
  • Flexible extensions for hard-to-reach areas.
  • Convenient and effective coolant refill process.
  • Average Rating out of 5:
  • Price Range: $17.99
  • Color: Color Coded
  • Material: Plastic

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Price: $17.99
8

Red Line WaterWetter Super Coolant (2 Pack)

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Brand: ‎Red Line
  • Enhances cooling system's wetting ability.
  • Protects against rust and corrosion.
  • Use straight water or reduced antifreeze levels.
  • Treats 3 to 5 gallons of coolant.
  • Compatible with DEX-COOL and long-life antifreeze.
  • Meets ASTM D2570 and D1384 corrosion standards.
  • Proven performance since 1979 with no compromises.
  • Average Rating out of 5:
  • Price Range: $27.78

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Price: $27.78
9

Liqui Moly Radiator Stop Leak (250 ml)

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Brand: ‎Liqui Moly
  • Instantly seals radiator leaks effectively.
  • Protects combustion chamber from coolant damage.
  • Compatible with all cooling systems.
  • Easy application for quick repairs.
  • Prevents overheating and engine damage.
  • 250 ml bottle for convenient use.
  • Enhances overall cooling efficiency.
  • Average Rating out of 5:
  • Price Range: $8.99
  • Material: Plastic

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Price: $8.99
10

Bar's Leaks High Mileage Coolant Repair

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Brand: Bar's Leaks
  • Effectively stops cooling system leaks.
  • Compatible with all antifreeze brands.
  • Works with conventional and extended life coolants.
  • Advanced carbon fiber formulation for longevity.
  • Easy to use and apply.
  • Prevents overheating and engine damage.
  • Ideal for high mileage vehicles.
  • Average Rating out of 5:
  • Price Range: $9.53

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Price: $9.53
11

CMTOOL Universal Coolant Refill Kit

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Brand: ‎CMTOOL
  • Quickly removes air and refills coolant system.
  • Includes 2 air fittings and 5 adapters.
  • Compatible with various vehicle brands and types.
  • High-quality materials ensure durability and corrosion resistance.
  • 41.3-inch thickened hose for efficient coolant transfer.
  • Includes brass tee joint for vacuuming connections.
  • Comes with a custom blow-molded case for storage.
  • Average Rating out of 5:
  • Price Range: $49.99

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Price: $49.99
12

Phoenix Systems BrakeStrip Plus Test Kit

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Brand: ‎Phoenix Systems
  • 100 double-ended test strips for accurate results.
  • Compatible with DOT 3, 4, and 5.1 fluids.
  • Includes 100 rating scale cards for easy reference.
  • Tests all coolant colors reliably and consistently.
  • Provides evidence for necessary brake fluid exchanges.
  • Ensure coolant is diluted 50/50 for accurate testing.
  • Perfect for shop customers seeking reliable diagnostics.
  • Average Rating out of 5:
  • Price Range: $74.19

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Price: $74.19
13

Generic Arctic Air 1234YF Kit (4 Cans)

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Brand: ‎Generic
  • Includes 4 cans of Arctic Air R1234yf.
  • Compatible with R1234yf refrigerant systems.
  • Each can contains 4 oz (113g) of refrigerant.
  • Flexible brass gauge for easy charging.
  • Quick and convenient air conditioning top-ups.
  • Simple connection to low-side service port.
  • Follow instructions for hassle-free usage.
  • Price Range: $79.00

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Price: $79.00
14

Shell Rotella ELC Coolant (1 Gallon)

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Brand: ‎Shell Rotella
  • Superior protection against overheating and freezing.
  • Nitrite-free technology prevents water pump failures.
  • Improves water pump seal life effectively.
  • No regular supplemental coolant additives required.
  • Contains a bittering agent for safety.
  • Excellent pitting protection for cylinder liners.
  • Extended life formula for long-lasting performance.
  • Average Rating out of 5:
  • Price Range: $18.46

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Price: $18.46
15

Genuine Ford VC-8 Diesel Cooling Additive (16 oz)

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Brand: ‎Genuine Ford
  • Genuine Ford VC-8 cooling additive for diesel engines.
  • 16 oz bottle for easy application and storage.
  • Replaces fluorescent green V119 premium antifreeze/coolant.
  • Meets Ford specification ESE-M97B44-A requirements.
  • Compatible with yellow Motorcraft gold antifreeze/coolant.
  • Prevents color change when mixing with existing coolant.
  • Enhances cooling system performance and longevity.
  • Average Rating out of 5:
  • Price Range: $11.25

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Price: $11.25
16

GM Cooling System Seal Tablets (Pack of 5)

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Brand: ‎General Motors
  • Compatible with DEX-COOL and other coolants.
  • Non-toxic formulation for safe automotive use.
  • Pack of 5 tablets for convenient use.
  • Each tablet weighs 4 grams for effective sealing.
  • Formulated for various vehicle cooling systems.
  • Helps prevent leaks and maintain coolant levels.
  • Easy to use for quick engine maintenance.
  • Average Rating out of 5:
  • Price Range: $4.39

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Price: $4.39
17

Parts Express Radiator Stop Leak [1 Pint]

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Brand: Parts Express
  • Stops radiator leaks quickly and effectively.
  • Compatible with all antifreezes and water types.
  • Prevents engine damage from coolant leaks.
  • Easy to use; just add to coolant.
  • Ideal for emergency repairs and preventative maintenance.
  • Does not block small cooling system passages.
  • One pint treats up to four gallons.
  • Average Rating out of 5:
  • Price Range: $15.88
  • Material: Rubber

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Price: $15.88
18

VP Racing Cool Down Coolant (16 oz, 2 Pack)

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Brand: ‎VP Racing
  • Reduces coolant temperature by up to 30°F.
  • Enhances coolant flow for better heat transfer.
  • Protects aluminum alloy radiators and vital components.
  • Meets ASTM specifications for engine coolant standards.
  • Safe for track use, glycol-free formula.
  • Maximizes horsepower and performance effectively.
  • Ready to use, treats 12-20 quarts of coolant.
  • Average Rating out of 5:
  • Price Range: $30.99

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Price: $30.99
19

Black Swan Mfg Co [06005]

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Brand: Black Swan
  • Efficient powdered boiler stop-leak solution.
  • Free-flowing powder for easy application.
  • Forms a strong seal upon air contact.
  • Non-disruptive to regular boiler operations.
  • 1lb size for convenient storage.
  • Ideal for quick leak repairs.
  • Durable and reliable sealing performance.
  • Average Rating out of 5:
  • Price Range: $16.95

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Price: $16.95
20

Evans EC42001 Waterless Prep Fluid (128 oz)

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Brand: EVANS
  • Engineered to purge cooling system effectively.
  • Removes old coolant and water residues.
  • Ideal for block drains that are inaccessible.
  • Ensures optimal water content with new coolant.
  • Protects metals during flushing process.
  • Not a substitute for Evans Waterless Coolants.
  • Includes funnel for easy application.
  • Average Rating out of 5:
  • Price Range: $31.24
  • Material: Waterless Coolant

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Price: $31.24
21

OEMTOOLS Coolant System Refiller Kit [27066]

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Brand: ‎OEMTOOLS
  • Refills entire cooling system quickly and efficiently.
  • Eliminates trapped air for optimal performance.
  • Easy leak detection under vacuum pressure.
  • Includes three adapters for versatile use.
  • Compatible with most radiator necks and reservoirs.
  • Simple operation using a standard air compressor.
  • Time-saving tool for DIY and professional mechanics.
  • Average Rating out of 5:
  • Price Range: $116.97
  • Size: ‎3 Adapters

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Price: $116.97

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