Synko-Flex® Waterstop

his self-sealing, non-swelling preformed joint sealant provides a lasting, watertight bond on both fresh and cured concrete surfaces. Synko-Flex® Waterstop achieves a watertight seal within cold joints at footings, walls and slabs. Rain and moisture resistant, Synko-Flex® Waterstop is also a simple, long-term solution for sealing pipes, sleeves, and collars embedded or cast into concrete structures.


  • Eliminates split forming, wiring to rebar, heat welding of splices
  • Unaffected by rain or moisture during installation

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  • Offers excellent chemical resistance
  • Bonds to most substrates
  • Unaffected by cyclic wetting and drying
  • Safe for use in potable water structures


  • Extruded in a square cross-section between two quick-release protective wrappers
  • Available in 35 (1 in. x 3 ft.) strips per case
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