U-Channel EDPM Extrusion
![](https://www.blackthorn-inc.com/wp-content/uploads/2023/08/uchannel-closeup-267x300.jpg)
![](https://www.blackthorn-inc.com/wp-content/uploads/2023/08/Fiberglass-CRH-with-U-Channel-300x163.jpg)
Can be applied to the outer edge of fiberglass hole-formers/knockouts to create a tighter fit to the jacket, reducing the risk of concrete leaking into the back of the hole-former/knockout.
Great for jacket-mounted parts, tapered walls, and out-of-round molds.