best sealant for windows

[someonelse]

I've patched up my wooden window frames/cills and re-painted, but get occassional water ingress under the cill (there's lead flashing but I think it doesn't extend far/high enough back under the wooden cill).

So I plan to add sealant between the top of the flashing and base of the wooden cill.

Acrylic or silicone? Or something else?

 

[TheDec]

Silicone may do it or flash band may be another choice a bit difficult to tell really.

Dec

 

[misterhelpful]

Gaps should be filled with a lead pointing sealant which can be bought at most builders merchants and some DIY stores. Failing that you could use a low modulus silicone.

Ensure there is a drip edge on the underside of the cill in order to prevent rainwater from running back towards the house.