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Butyl-Nek flexible sealing compound provides a permanent watertight joint between pre-cast concrete units, regardless of shape or size. This easily compressible product is designed to completely seal and fill the annular space between pre-cast units. Butyl-Nek is available in a range of sizes to accommodate joints for manhole units, box culverts, pipes and inspection chambers.


  • Applies easily in temperatures as low as -1°C.
  • Won’t shrink, harden, or oxidize.
  • Retains compressibility through a range of deflection.

General information
Specification data
Product Reference



12 x 60 mm

22 x 22 mm