Sealing window frames Best way?

We have just managed to buy a decent window S/H and have had it fitted.
It is a thermally efficient double glazed Rylock so I want to stop any warm air /cold air getting around the frame. Which is the best sealant to use ?
I have forced some 10mm foam filler rod into the gaps at the bottom and side and was going to K-Mart to get a couple of pool noodles to seal the large gap at the top [ needed for installation] but was will also use a flexible sealant if needed.


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