Polylok Seals for 12″ & 20″ D-Boxes

Our D-Box seals are the only true watertight seals on the market today. Our 4” seal fits in both our 12” and 20” plastic D-Box. It accepts 2”, 3”, 4” and corrugated pipe. Our 6” seal works in our 20” plastic D-Box. No other seals can do so much!


  • Provides a watertight connection
  • No more different fittings to inventory
  • Easy to install
  • Easy tear outs to accommodate different size pipe

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By Published On: November 24th, 2018Categories: , , Comments Off on Polylok Seals for 12″ & 20″ D-Boxes