A few weeks back i had a coolant leek,

Had the thermostat housing replaced and some hoses that were leaking at the ends, Its cured the problem 95% but still need to top up every week,, and i can still smell Antifreez when i park up,(Like curry)

Wondering if i should use some Radweld to finish it off

I'd get the job done properly myself. If there's still a leak somewhere it needs to be investigated further.

Perhaps you have a cracked EGR cooler? That's the usual place for losing coolant. Bodsys Brake Bible
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Radweld is a bodge; suitable for old nails at the end of their life maybe but certainly not an RRS. Basically its a sludge designed to block small apertures so has habit of blocking important small water passageways and causing problems particularly in heater matrixes. Agree with previous post - find your leak and fix it properly. And if your curry smells of ethylene glycol (a potent poison) suggest you change your supplier  2008 MY Java Black TDV8 HSE

The old fashioned solution was "two egg whites", because it dries hard when exposed to heat and air - it can actually seal significant seapages.

Would I use it in a RRS - probably not unless it was a get-you-home fix.

Thanks for the advice,, i'l steer clear of the Radweld.