Vinyl J Channel/Flex J

Our Vinyl J Channel or Flex J Channel is specifically designed for the windows and siding industry and is ideal for round, oval, half-moon and other custom or curved windows and doors.

Flex J provides flexibility that rigid J channel cannot. Our Flex J product can be easily adapted to confirm to just about any shape and the pre-cut slits facilitate installation.

Our product is available in multiple colors with 3 available widths: 3/4 inch, 1-1/4 inch and 1-1/2 inch. Each piece is 12 feet 6 inches long.

flex j channel

Available colors:
Bright White, Flat White, Tan, Beige, Gray, Pewter and Bronze (The 1-1/4 and 1-1/2 inch sized are not available in all colors.)


Order Flexible J Channel Online

Select your size below: (Match colors with image and name above))



Product Details:


  • Flexible J Channel

Industries Served:


  • Housing
  • Construction
  • Siding & Windows

Video: How Flex J Channel is Installed

The video below demonstrates how the professionals at Certainteed utilize the Flexible J Channel for their vinyl siding installation around an arched window. For more information, fill out our CONTACT FORM.