If the window is surrounded by wood trim use a high grade polyurethane caulk to seal all gaps between the trim and the siding and the trim and the window.
How to seal windows and doors for summer.
Take special care to seal the top side of the top piece of trim.
You don t want to place new caulking over the old stuff.
Scrap it all away completely clean the surface with rubbing alcohol and wipe it down with a cloth.
The only drawback is that it isn t the snazziest look and as it will cause distortion don t use this method for any window you need to see clearly through.
To begin cut the tip off of the tube of caulk at a 45 degree angle so that the tip will fit nicely into the window seam.
To prevent leaks caulk the window where it meets the exterior siding.
The tube of caulk should specify it s intended for.
Apply the caulk by moving the gun along the seam in a smooth motion while squeezing the tube with even pressure.
How to seal a window as with your doors you want to look for instances of broken and missing caulking around your windows that are letting those costly drafts in.
Use a door snake if you have a drafty window or door these little snakes are a must have in your home.
Apply new caulk one tube should be enough to seal a whole window.
In just about 15 seconds per each window you can reduce the heat in your house significantly.