Top 8 Radiator Leak Sealant UK – Fillers, Adhesives & Sealants

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1. Granville

Granville Ce-Lit Radiator Stop Leak Cement Sealant Powder 1

Granville - Please note: Not suitable for certain Rover models. Compatible with all types of glycol based antifreeze normally used in cooling systems. For: radiators, Cylinder Blocks & Water Pumps. Works with Anti-Freeze & Coolant. Powder formulation in a Sachet.
Part Number0244

2. Liqui Moly

Liqui Moly 8956 Radiator Stop Leak

Liqui Moly - Run the heating system. Used for sealing small leaks in cooling circuits of passenger motor vehicles, commercial vehicles, buses and two-wheel vehicles. Small leaks caused by stone impacts, porous soldering points and hairline cracks in the cooling simple are easy to localize one notices that the cooling water level is sinking. Also suitable for cooling circuit with filters. Shake container before use. With the engine running, pour the contents into the cooling fluid at operating temperature and allow the engine to continue running for a further 10 minutes.
BrandLiqui Moly
ManufacturerLiqui Moly GmbH
Height5 cm (1.97 Inches)
Length10 cm (3.94 Inches)
Weight0.15 kg (0.33 Pounds)
Width5 cm (1.97 Inches)
Part Number8956


2x Liqui Moly 3330 Radiator Stop Leak Radiator Sealant 150ml

LIQUI MOLY SET - Also suitable for aluminium and plastic cooler. Compatible with all standard cooling stabilisers and anti-freeze. -. Suitable for all cold water and hot water systems, with or without water filters.

Item number: 3330 Also suitable for preventative use. Radiator stop Leak Seals those leaks immediately easily and completely. Contents sufficient for up to 10 litres of coolant. Beginning to the combustion Raum against all damages to secure coolant. Small leaks due to stone, porous solder connection or hair cracks in the cooling system are not easy to locating is just the coolant is decreasing stand firmly attached.
ManufacturerLIQUI MOLY
Height7 cm (2.76 Inches)
Length5 cm (1.97 Inches)
Width5 cm (1.97 Inches)
Part NumberSET014280222


6 x 325 ml Mannol 9966 Radiator Leak Stop/Cooler Sealant Additive

MANNOL - For removing leaks in the cooling circuit of the engine. Seals leaks in seals, clamps and small cracks in the radiator. Mannol cooler sealant item : 9966. Item: 6 / 1950 ml.
Part Number9966-6


KALIMEX LTD ST5501 Coolant Leak Repair, One Size

KALIMEX LTD - Multi purpose ONe Step & Permanent. No flushing. Item package dimension: 4. 4 cm l x 8. 8 cm w x 12. 6 cm H. Mixes with all types of Antifreeze. Just shake, pour and go.
ManufacturerK-Seal International Limited
Height15.24 cm (6 Inches)
Length20 cm (7.87 Inches)
Weight0.27 kg (0.6 Pounds)
Width5.08 cm (2 Inches)
Part NumberST5501
Warranty1 year manufacturer

6. Radweld

3x250ml = 3 Pack, Holts Radweld Radiator Leak Sealer HOL-RW2Y-3

Radweld - 5055661704007,. Radweld radiator sealer, Number 1 radiator repair, Undisputed market leader, Permanently seals radiator leaks. Permanently seals radiator leaks, unaffected by anti-freeze also contains rust inhibitors, safe for use with rubber hoses.
Weight0.75 kg (1.65 Pounds)
Part NumberHOL-RW2Y-3

7. K2

3 x 18.5g Professional Cooling System Sealant Glue Radiator Additive Stop Leak K2

K2 - Extremely easy to use. Safely fills & seals minor leaks in a cooling system. Essential during long distance trips in case damage of a radiator. Can be mixed with any available antifreeze and coolants, including extended life coolants. Doesn't block or corrode any components of a cooling system. 3 x 18. 5 g premium quality k2 Stop Leak Professional Cooling System Sealant.
Part NumberT230

8. K-Seal

K-Seal DE5501D Universal Radiator Sealant

K-Seal - Permanent sealing. Sealing most leaks in engine blocks, cooling systems, cylinder heads etc. Just add to the cooling systems! K-seal - the all-rounder, repairs almost everything in the system. Cooling system does not need to be emptied or rinsed before use.
Height11 cm (4.33 Inches)
Length8.5 cm (3.35 Inches)
Width4 cm (1.57 Inches)
Part NumberDE5501D