Seal small cracks and gaps in your siding under 1 4 inch wide using an acrylic latex caulk.
How to seal siding from bugs.
Caulk is cheap easy to apply and can go a long way towards keeping bugs out.
First vinyl siding has tiny weep holes at the bottom of each course panel to allow moisture to escape.
There are a few spots in siding where you can successfully introduce insecticides.
I take advantage of these tiny holes using pyrethrin aerosols and an injection straw.
Use caulk to patch small cracks in foundations and siding or use it to seal joints where the siding meets the roof or foundation.
Simply apply this inexpensive filler into the cracks to seal.
I d use dusts but the ready made hole is far to small.
And unless you want to cover the wood with epoxy to completely seal everything in i don t think there s an impervious finish against insects.