Foolishly many years ago I bought myself this gadget from Screwfix.
Run a bead of silicone on the window seal. Use the tool and bang.... Splodges of silionce all over the place.
My tecnique (if you can call it that) is to go sparingly on the silicone and to use my little finger to smooth it. My index finger to finish off.
Problem? The tiles cut my pinkies to shreds.
What happened was that I paid for my
tiler to come and tile. He managed to finish all the tiling then asked ME to grout and silicone a week later.
Easy I thought.....
I am not sure what the tips are for running silicone but I was told you need a steady hand to apply, a steady (and wet finger) and not to use too much.
Amazingly there are also companies that come round just to do siliconing work. I found this out from my mate Andy who is a
tiler. On top london jobs he leaves it well alone because the silicone man has to do things like sinks, toilet pans, funny shapes. Apparantly he has a whole kit bag of little shapes and tools to make these perfect silicone finished.
OK if its a top insall. But most jobs - who is going to outsource to the man?