Hello, all! My wood stove worked fantastic all last winter. I am getting her ready for this winter! I was cleaning out my stack with the usual 6" round brush that is screwed into a DIY rod about 4 feet long. I accidentally poked a 3/8" hole in the refractory panel that sits just over the secondary burn tubes, where you can see it when you look into the smokestack exit..... Should I worry about this? Could I patch it with stove cement, or simply cover it by setting a small stainless steel plate over the hole? Thanks in advance! 
{The hole is visible in this image}
![[Hearth.com] Poked a hole in my refractory insulation with chimney cleaning tool. [Hearth.com] Poked a hole in my refractory insulation with chimney cleaning tool.](https://www.hearth.com/talk/data/attachments/140/140314-7586a74c196531237ba0a4f09fd1275d.jpg?hash=exxVSPy9Re)

{The hole is visible in this image}
![[Hearth.com] Poked a hole in my refractory insulation with chimney cleaning tool. [Hearth.com] Poked a hole in my refractory insulation with chimney cleaning tool.](https://www.hearth.com/talk/data/attachments/140/140314-7586a74c196531237ba0a4f09fd1275d.jpg?hash=exxVSPy9Re)
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I am not even sure that that little hole would make a difference, but why not try to correct it? Thanks again.![[Hearth.com] Poked a hole in my refractory insulation with chimney cleaning tool. [Hearth.com] Poked a hole in my refractory insulation with chimney cleaning tool.](https://www.hearth.com/talk/data/attachments/140/140335-ce76a9138919d436a1616d4bc6b3771c.jpg?hash=akzFUy_nuk)
![[Hearth.com] Poked a hole in my refractory insulation with chimney cleaning tool. [Hearth.com] Poked a hole in my refractory insulation with chimney cleaning tool.](https://www.hearth.com/talk/data/attachments/140/140336-f3596ef574786337c3a11a313edc9dfc.jpg?hash=UG5pRHdDsi)
![[Hearth.com] Poked a hole in my refractory insulation with chimney cleaning tool. [Hearth.com] Poked a hole in my refractory insulation with chimney cleaning tool.](https://www.hearth.com/talk/data/attachments/140/140338-202b434d69380e829485854bbfa19d0d.jpg?hash=CkhlmvXDhE)