Sometimes you are just too busy to get that leak fixed
so in this case I will recommend a quick temporary repair.(just this once)
Here are a few quick building maintenance tips that will get the leak repaired until a professional building maintenance contractor or house painter can sort out the problem.
Uses- any dry solid surface, gaps and cracks up to 15mm
Choose a paintable product such as MS(modified sealant) Fix All or Blockade,
There is nothing worse than having to remove silicone residue for your house painting to be effective.
Mask the area first so you don't make a mess and have some turps and a rag handy.
Uses - pipe penetrations and any gap over 10mm wide
Any brand will do, just get a small can as it does not keep well.
Once you have used the product don't touch it again untill it is hard ( 2 hours ) Then trim with a box cutter knife.
You can apply a layer of paintable silicone if you like or just paint over directly during your next house painting schedule, as it is waterproof and stable.
Uses - roofs and gutters, clean and dry surfaces
If you get through this list and haven't solved your problem then call your house painting or building maintenance professional.
Happy home maintenance