Non-hardening electrical putty, also known as duct seal compound or mastic, is the preferred material for sealing wire entries directly inside the box. This practice is a fundamental part of maintaining a structure's envelope. It prevents the uncontrolled movement of air, moisture, and. Outdoor power distribution box equipment operates in harsh year-round environments, prone to insulation aging, water ingress and short-circuit faults that jeopardize stable power supply. Superior insulation performance and professional sealing design are the core criteria for selecting qualified. Seal an electrical enclosure by matching the IP/NEMA rating, using the right gasket, cable glands, sealant, and inspection steps to block dust, water, and corrosion. They are non-corrosive, strong, and lightweight for easy handling. Inlet and outlet elevations are positioned to provide equal distribution and meet most local codes.
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