BEST DEALS THIS WEEK

10 Best Car Radiator Flush And Cleaner - May 2026

19M consumers helped this year.

Last Updated: 27-05-2026

1

Holts Speedflush Coolant Flush, Universal Car Radiator Flush, High Performance Coolant Flush For Radiators & Cooling System, Quick & Easy To Use, Prevents Overheating, Suitable For All Cars, 250ml

Holts Speedflush Coolant Flush, Universal Car Radiator Flush, High Performance Coolant Flush For Radiators & Cooling System, Quick & Easy To Use, Prevents Overheating, Suitable For All Cars, 250ml

Holts

9.8

9.8

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2

Liqui Moly 1804 Radiator Cleaner 300ml (Pack of 2)

Liqui Moly 1804 Radiator Cleaner 300ml (Pack of 2)

Liqui Moly

9.6

9.6

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3

Prestone Coolant Flush, Engine Coolant Flush For Car To Prevent Problems & Maximise Performance, Car Coolant Flush With Advanced Cleaner To Dissolve Corrosion & Scale, New Formula, 1 Litre

Prestone Coolant Flush, Engine Coolant Flush For Car To Prevent Problems & Maximise Performance, Car Coolant Flush With Advanced Cleaner To Dissolve Corrosion & Scale, New Formula, 1 Litre

Prestone

9.5

9.5

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4

LIQUI MOLY Radiator Cleaner | 300 ml | Cooler additive | SKU: 1804

LIQUI MOLY Radiator Cleaner | 300 ml | Cooler additive | SKU: 1804

Liqui Moly

9.2

9.2

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5

Holts Speedflush Coolant Flush, Universal Car Radiator Flush, High Performance Coolant Flush For Radiators & Cooling System, Quick & Easy To Use, Prevents Overheating, Suitable For All Cars, 250ml

Holts Speedflush Coolant Flush, Universal Car Radiator Flush, High Performance Coolant Flush For Radiators & Cooling System, Quick & Easy To Use, Prevents Overheating, Suitable For All Cars, 250ml

Holts

9.1

9.1

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6

Prestone Coolant Flush, Engine Coolant Flush For Car To Prevent Problems & Maximise Performance, Car Coolant Flush With Advanced Cleaner To Dissolve Corrosion & Scale, Safe For All Engines, 1 Litre

Prestone Coolant Flush, Engine Coolant Flush For Car To Prevent Problems & Maximise Performance, Car Coolant Flush With Advanced Cleaner To Dissolve Corrosion & Scale, Safe For All Engines, 1 Litre

Prestone

8.8

8.8

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7

Wynn's Radiator Flush - Acid-Free Dual Action Formula Removes Rust, Scale, Oil & Deposits - Compatible with All Coolants including OAT - Safe for Rubber Hoses & Metal Parts - 325ml

Wynn's Radiator Flush - Acid-Free Dual Action Formula Removes Rust, Scale, Oil & Deposits - Compatible with All Coolants including OAT - Safe for Rubber Hoses & Metal Parts - 325ml

Wynn's

8.6

8.6

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8

Radiator Flush, Engine Cooling System Cleaner, Scale Rust Sludge Remover, Safe for Metal Components, 300ml

Radiator Flush, Engine Cooling System Cleaner, Scale Rust Sludge Remover, Safe for Metal Components, 300ml

Generic

8.4

8.4

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9

K2 Radiator, engine Kühlsystemr Some Cleaner 400 ml

K2 Radiator, engine Kühlsystemr Some Cleaner 400 ml

K2

8.2

8.2

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10

LIQUI MOLY Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2427

LIQUI MOLY Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2427

Liqui Moly

8.1

8.1

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