Wynns Radiator Stop Leak – 325ml (55864)

Name: Wynns Radiator Stop Leak - 325ml (55864)
Brand: Wynns
SKU: WYN-55864
Price: 7.89 GBP
Availability: InStock

£7.89 inc. VAT

8 in stock

Next-day delivery Order by 1pm Monday and it’s with you on Tuesday.

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325ml radiator stop leak
Slow leaks and head gaskets
With anti-corrosion

Next-day UK delivery £3.99 (order by 1pm Mon–Fri), or free click & collect from our Bulwell shop — 2–4 Carey Road, NG6 8AT. Choose collection at checkout, then pick it up any time in opening hours (Mon–Fri 9–5:30, Sat 9–1) — just quote your order number.

Next-day UK delivery £3.99 (order by 1pm Mon–Fri). Home delivery only: click & collect isn’t available for this item. With items from our shop in the same order, delivery is £5.99 (two parcels).

SKU: WYN-55864 Category: Additives & Cleaners Brand: Wynns

Description
Additional information

Description

Genuine Wynns · Part no. 55864

Wynns Radiator Stop Leak 55864 is a 325ml sealer for slow coolant leaks from the radiator or elsewhere in the cooling system, including at the head gasket, with anti-corrosion protection added. It is the easy first try when the expansion tank keeps dropping but there is no obvious split hose or failed part.

Good to know

What should I check before using it? Look along the hoses, clips and radiator for wet spots or white crust; a loose clip only needs tightening and a split hose needs replacing.
How do I add it safely? Never open the radiator or expansion tank cap while the engine is hot: the cooling system is under pressure. Add it cold.
How will I know it worked? Mark the coolant level and check it cold over the next few days; if it still drops, the leak needs a proper repair.

Which one?

For cracks in the head or block, Holts Wondarweld (HREP0062A) is the heavier sealer. If you want the treatment that also says it won't clog radiator waterways or sensors, Wynns Cooling System Stop Leak (45644A) is the alternative.