Hydro-Flex® Waterstop

Short Product Description

Hydro-Flex<sup>®</sup> Waterstop

Hydro-Flex® Waterstop

Henry’s Hydro-Flex® Waterstop is an easy to use, preformed, self-adhesive hydrophilic waterstop that provides a watertight seal in cold joints on concrete structures. Designed to swell into unconsolidated concrete surfaces upon contact with water, Hydro-Flex® Waterstop features an advanced blend of butyl rubber, polypropylene elastomers, hydrophilic fillers and plasticizers. For exterior use only.


  • Eliminates split forming, wiring to rebar, heat welding of splices
  • Stays flexible in cold weather
  • Offers excellent chemical resistance
  • Bonds to most substrates


  • Available in .5 in. x 1.125 in. x 16.67 ft. coils – 6 per carton