10 Best Car Radiator Flush And Cleaner

10 Best car radiator flush and cleaner - January 2026

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Last Updated: 06-01-2026

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Wynn's Commercial Vehicle Cooling System Flush - Powerful Acid-Free Cleaning for Limescale, Corrosion & Sludge Removal - Safe for Cooling System Materials - Compatible with OAT Coolant - 1L

Wynn's

9.8

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LIQUI MOLY 5189 Pro-Line Radiator Cleaner 1 Litre - Black

Liqui Moly

9.6

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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

9.5

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Best value

15% Off

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

Liqui Moly

9.2

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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

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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

8.8

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STP Radiator Flush 300 ml, Quickly Cleans All Radiator Cleaning Systems, Prevents Overheating, Rust and Corrosion, Mechanical Car Cleaning Products, Made in the UK

STP

8.6

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15% Off

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

Liqui Moly

8.4

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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

8.2

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Castrol Radiator Cleaner 250ml

Castrol

8.1

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Wynn's Commercial Vehicle Cooling System Flush - Powerful Acid-Free Cleaning for Limescale, Corrosion & Sludge Removal - Safe for Cooling System Materials - Compatible with OAT Coolant - 1L

LIQUI MOLY 5189 Pro-Line Radiator Cleaner 1 Litre - Black

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

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

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

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

STP Radiator Flush 300 ml, Quickly Cleans All Radiator Cleaning Systems, Prevents Overheating, Rust and Corrosion, Mechanical Car Cleaning Products, Made in the UK

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

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

Castrol Radiator Cleaner 250ml

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