Extrudex Flex J Channel

Engineered To Be The Best Flexible J-Channel!

FleX-J, the flexible j-channel from Extrudex, boasts a unique design and material selection that sets it apart from the competition. The features of the Extrudex FleX-J make it the best option for the installation of round and arch top windows.

FleX-J is unique in that it offers a true 1” face, one of the largest available on the market today. Designed from a combination of 97 and 80 Shore-A FPVC makes the Extrudex FleX-J the most stable, extruded flexible j-channel, while also providing the flexibility required for easy installation.

  • Superior design. An enhanced design feature extends the semi-rigid 97 durometer material partially up both the Face and Nail Fin, allowing the Extrudex FleX-J to hold its shape around tight radii and thus reducing the possibility of deforming the 1″ face during installation. With two available sizes – 3/4” and 1-1/8”– each piece of flexible j-channel siding provides the proper fit with siding, limiting the distortion associated with “one-size fits all” j-channels.
  • Another aspect of the FleX-J by Extrudex is that it is the only flexible j-channel offered with “curled-over” top on the face side. This unique feature provides the same professional finish found with rigid j-channels The FleX-J offers the longest nail fin (1.67”) available. The nailing fin is tapered, ensuring easy installation. This flexible j-channel for vinyl siding can streamline installation times and provide long lasting results. The FleX-J is pretreated with UV inhibitor and fungicide to ensure that the j-channel is long-lasting and looks good.

Interested in the FleX-J by Extrudex? Contact us by e-mail or phone at (440) 352-7101, or request a quote online.


FleX-J Specs

3/4'' FleX-J Channel
3/4” FleX-J Channel
1 1/8'' FleX-J Channel
1 1/8” FleX-J Channel


Flex-J Shipping Information

Carton Size
Lineal Feet/Carton
Shipping Weight/ctn
12pk = .75 = 38# / 1.125 = 43#
Delivery Time
5 working days for stock items
Painesville, OH 44077