Window frame hole: patch it with what?

[The Old Maid]

We have yellow-jackets. They have gnawed into the exterior basement-window frame to get to the void beneath the exterior siding. Unfortunately a few of them gnawed around the window to make a pinhole into the basement.

Obviously the window is old and should be replaced. It was a homemade job, apparently: metal with glass, and framed by wood.

Today's question is simply what we should use for the immediate situation to fill the interior hole (basement side) of the window frame. Liquid mortar? liquid concrete? wood putty? Drylock? spackle/polyfilla? piece of masking tape? other?

Don't worry, the little monsters have an appointment with bye-bye-bug-man. The current plan is to gas-spray, then follow up with dust.

But before they get sprayed, we need to go to the store and get the plugging material. They we show BBBM where they got in; he treats the basement side of the hole; we seal the hole. Then he does the outside entry.

So what is the best plugging material for this job?

 

[Breplum]

Bubble gum or anything. As you said, the window should be replaced, so why be discerning?

 

[Sponsor]

 

[Reach4]

Regular latex caulk is probably fine.

Great Stuff Pestblock foam https://www.greatstuff.dupont.com/products/greatstuff-pestblock.html is supposed to even be mouse-resistant.

 

[The Old Maid]

Thanks, @Reach4.

@breplum, I got a smile from the bubble-gum sentiment. Window replacement, eventually. Just not before the stingers are extremely dead.

Thanks all.