How To Seal Around Window Air Conditioner Fixed

“For a permanent, rent-friendly seal, combine foam weatherstripping with removable caulk cord (also called ‘sealant rope’). It’s reusable, leaves no residue, and fills irregular gaps better than tape.”

[Outside] <-- sill slope down --> | Foil tape over side seam | | Foam strip at top sash | [Window sash] ===================== [AC top] | | | Side foam + wood shim | | | [Window sill] --- silicone bead (exterior) --- how to seal around window air conditioner