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 pliable, non-toxic compound is easily molded by hand to form a plug around the wire bundle where it passes through the back. 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. Simply follow the 6-step instructions below to add your seals whi h the 8 x screws (included). Polylok risers fit seamlessly and are available in two heights - 150mm (6”) or 300mm (12”) - please ask for mo to proviAutomated sealing solution for control cabinet construction The lifelines of highly automated industrial production for electrical distribution and for the control and safety technology of manufacturing plants come together in control cabinets and electrical distribution boxes right down to the. How to install and utilize the pipe seals that come with the Polylok distribution boxes. Our D-Box seals are the only true watertight seals on the market today. Our 4” seal fits our 4-hole, 7-Hole and 10-Hole plastic D-Boxes. It accepts 2”, 3”, 4” and corrugated pipe. No other seals can do so much! Looking for a personalised quote? How. 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.