K-Seal®

Permanently seals leaks in the head, head gasket, block,
radiator, heater matrix and water pump.

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Permanent Coolant Leak Repair with K-Seal

Coolant leaks don’t have to result in costly repair bills – simply add K-Seal to your coolant system for a quick and permanent fix. K-Seal is scientifically tested, trusted by millions of customers worldwide, and the only coolant leak repair fluid carried by the AA, the UK’s largest roadside repair company.

Just pour & go

K-Seal couldn’t be simpler to use. Just shake the bottle, add the fluid to your coolant system, and run your engine as normal. K-Seal’s unique formula will seek out holes and cracks, and permanently seal them, with no adverse impact on the efficiency of your engine cooling.




Trustpilot

I’d just like to say that my old Mazda 626 finally developed a coolant leak at the head gasket to the external face. 10 minutes after K-Seal the leak has gone entirely. Thanks!

Jon, Australia View more case studies

Where to buy K-Seal

Not in Australia?

FAQs

Is K-Seal compatible with all types of coolant?

Yes. K-Seal does not react with coolant or other additives that may already be present in the system.

Is there any special preparation I need to do before using K-Seal?

Unlike other block sealers, K-Seal is a simple ‘pour & go’ solution. Shake the bottle well and then add the entire contents to the cooling system where you would normally top up the coolant/water.

How much K-Seal do I need?

1 standard bottle of K-Seal (236ml/8floz) will treat cooling systems with a capacity up to 20 litres (this covers motorbikes up to light commercial vehicles). For larger cooling systems use our Heavy Duty (472ml/16floz) size K-Seal.

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Expert Advice

Head Gasket Failure? Cracked Head or Block?
Leaking Radiator?

Expert Advice

Where to buy K-Seal

Have any of these symptoms? K-Seal could save you thousands on a workshop repair. Search for a stockist today!

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