Why do I need tape layers to seal the cable lug?

Why do I need tape layers to seal the cable lug?

An expert from 3M details why Standard 3M Cold Shrink Termination uses Scotch 70 Silicon tape to moisture seal the cable end termination lug.

3M Cold Shrink Termination Kits - features at a glance :

-Viable cost-based alternative to heat shrink terminations
-Simple Cold Shrink installation (easier to use in enclosed areas)
-Safe installation (no torches or heat guns required)
-Less room for LV or HV cable jointer error
-Extensive quality and factory testing program
-Lower installed jointing cost compared to many competitive kits
-Accommodates a wide range of cable sizes
-Joints and terminations rated from 3.6/6.6(7.2)kV up to 26/45(52)kV

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