M-D Building Products 04283 84-Inch by 110-Inch Shrink and Seal Window Kit for Patio Door

Shrink & seal window insulator kit indoor shrink & seal 84 in width 110 in length Clear for patio door. crystal-clear film for use on interior windows to reduce cold air drafts. Improves the insulating r-value of windows up to 90-Percent. Clear film shrinks tight and wrinkle free to prevent cold drafts and heat loss through windowpanes. crystal-clear film for use on interior windows to reduce cold air drafts. Improves the insulating R-value of windows up to 90-Percent. Easy to install with tape and hair dryer. Clear film shrinks tight and wrinkle free to prevent cold drafts and heat loss through windowpanes.