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[Edited on 23/11/08 by Herman]

You have to be careful repairing rads with heat as they tend to fall apart.
They are usually made/repaired with them partially submerged in water.
I don't like liquid metal type products because of the heat from the rad, but they might work.

[Edited on 16/9/2007 by nitram38]

new radiator?

try www.partsgateway.co.uk

prices tend to be very good. £30 inc next day delivery for a radiator for my old BMW E30, £40 inc next day delivery for a door for the same car, and £80 inc next day delivey for a pair of front uprights for a bedford midi van.

JB Weld is your friend, two part plastic metal. Then if that doesn't work, buy a new one. Cheers Ray

(1) Any old metalised epoxy will do -- try Pound Shops.
(2) Add approx 1/3 of a container of K-Seal to the coolant -- unlike old fashioned coolant leak stoppers it won't cause problems with blockages in your engines coolant passages.

Just a quick update: Araldite actually did the trick in the end - No leaks!

Going to get a new rad anyway, as a longer term solution as this one is now FUBAR!