lead foil tape

lead foil tape

A tape, typically about ½ inch wide and 0.002 inch thick (12.5 mm × 0.05 mm), which is cemented to a window or panel to detect its breakage; forms part of an alarm circuit through which a small electric current flows. If the window or panel is broken, the tape is severed and the circuit is interrupted, thereby activating an alarm.
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Lead foil tape is great when dealing with harsher chemicals.