Thermwell Products Co., Inc Weather Seal Tape AC42H Dark Gray

Weather seal for window AC units

This open-cell foam tape is designed to fill the gaps around a window-mounted air conditioner. The compressible strip conforms to uneven surfaces to block drafts, insects and dust from entering the room. It suits homeowners and renters who need a simple, removable solution for seasonal cooling installations. The dark gray colour blends with most window frames and unit casings.

Resilient foam construction for daily use

The open-cell structure allows the tape to compress tightly against the window sash and AC chassis without losing shape over a season of vibration. At forty-two inches long it covers the perimeter of typical units, and the self-adhesive backing bonds to metal, vinyl or wood frames. The material remains pliable in temperature swings so the seal stays effective through hot days and cool nights.

Replaces worn or missing factory seals

This tape upgrades the thin foam strips that often deteriorate after one summer of sun exposure and window movement. It is worth fitting when the original gasket has flattened, torn or gone missing, restoring the barrier against air leakage and pests. The jump is most noticeable on older installations where the frame gap has widened and standard strips no longer make contact.