Hd Radiator Stop Leak 1oz

£1.50

Inc. VAT: £1.80

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PRODUCT DESCRIPTION: Stops Leaks Safely, Quickly & Easily, Compatible With Antifreeze. Heavy Duty Radiator Stop Leak will work faster and stop larger leaks than the so-called liquid stop leaks or the nonmetallic powdered stop leaks. Most "liquid stop leaks" and "non-metallic powder stop leaks" contain powder, wood, paper and other fibrous materials. They simply plug a hole and never harden. Heavy Duty

Radiator Stop Leak contains expensive pure copper particles plus special hardening and sealing agents.

Quick triple action seeks out leaks…fills and seals them with pure copper.

WORKS BEST ON: Radiators. Seals leaks, prevents rust, mixes with antifreeze.

4.0

12 Reviews

5★

4★

3★

2★

1★

James H.

Verified Buyer • 12 Mar 2026

Excellent product — exactly as described.

Used this on a JCB 3CX turbo downpipe. Fits perfectly, holds up very well to heat cycles. Much better than the fibreglass wrap I used previously — no itching, easier to handle. Will definitely be ordering again.

Mark T.

Verified Buyer • 28 Feb 2026

Great value, fast delivery.

Good quality wrap for the price. Arrived next day which was great. The 50mm width covered my headers nicely with a bit of overlap. Holds up well after a few heat cycles.

S. Patel

Verified Buyer • 14 Jan 2026

Decent product, application tricky without soaking first.

Wrap itself is good quality but I'd strongly advise soaking in water for 10–15 mins before wrapping — it makes it much more pliable and easier to apply. Didn't do this first time and it was frustrating. Product is fine though, no complaints.