The Thermwell Products Co. Inc. Indoor Window Insulation Kit (3-Pack) provides shrink film to insulate 3 standard sized windows to help increase their R-Values up to 90% for energy-saving efficiency.
• Designed for interior use on windows • Accommodates up to 3 standard sized windows • Each sheet measures 62 in. L x 42 in. W • Helps R-value increase up to 90% • Shrinks with hair dryer (not included) and applies with included double-faced tape • 3-pack allows you to insulate up to 3 windows
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