HydroCorner® Sill Treatment

Looking to further protect a windowsill from moisture intrusion? HydroCorner™ is an economic option that has lasting benefits, including preventing mold from forming on windowsills. It’s easy to install too – simply place one HydroCorner™ in each sill corner, and then cover with a piece of self-adhered flashing (HydroFlash®) for a quick and straight forward sill treatment installation.

The product easily fits into window corners and adds a reliable layer of protection against moisture. While meeting the sill pan requirement for an Energy Star Home, HydroCorner is also built to resist cracking in cold weather, making it suitable for bitter months.

Features of HydroCorner® Sill Treatment

  • Prevents water intrusion at window/wall interface keeping walls dry
  • Durable material resists cracking in cold weather or damage during window installation
  • Easy to install – no special tools / cutting required
  • Inexpensive, minimum increase in “installed” cost
  • Speeds sill pan assembly
  • Meets the sill pan requirement for Energy Star Home
  • Helps prevent the buildup of mold

Installation Tips for HydroCorner

  • Use a staple or nail to help hold the HydroCorner™ Sill Treatment in place
  • To create a proper pan in the rough opening of the window, take a strip of HydroFlash and fold it into the bottom.
  • Make sure the top corner of the sill is firmly adhered to the wall for the best protection.

We stand behind our products that protect your projects from moisture. Click here to see how you can get 15 Year Product Warranty for HydroCorner™ and other HydroFlash accessories.

Testing & Certifications

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