DEI Radiator Relief Diesel - 16 Oz Bottle

£12.31

Inc. VAT: £14.77

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Radiator Relief for Diesels supercharges your radiator heat more through the radiator. This proven coolant additive will reduce your operating temperature up to 17°C and reduce engine wear that occurs during extreme heat. NEW RADIATOR Relief for Diesels is also formulated with a corrosion inhibitor that reduces mineral deposits. This is the first additive that maintains pH levels that otherwise fluctuate over time resulting in core damage.

v 17°C lower operating temperature

v 50% quicker warm up

v No mixing required, just add to cooling system

v Compatible with water and all anti-freeze mixtures

v Safe with alloys

v 100% Biodegradable, non corrosive and non toxic

v For use in all water-cooled engines

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.

Specification	Blended for extreme use Decrease coolant temperature up to 30°F Concentrated for larger systems Quicker warm-up Helps reduce engine wear
Minimum Delivery Charge	3.50

DEI Radiator Relief Diesel - 16 Oz Bottle

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DEI Radiator Relief - 16 Oz Bottle