The chimney sweep who couldn’t figure out how to clean my chimney somehow broke off what I think is stove cement. Do I need to apply more or is it okay to leave as is. It came off the back right corner which you can see in the pictures.
Also what do I use to affix gasket to the top oval plate on a Jotul F500?
![Piece of stove cement broke off. Does it need to be fixed? Piece of stove cement broke off. Does it need to be fixed?](https://www.hearth.com/talk/data/attachments/269/269199-951c74155e0bec189a604f5dfae74912.jpg)
Also what do I use to affix gasket to the top oval plate on a Jotul F500?
![Piece of stove cement broke off. Does it need to be fixed? Piece of stove cement broke off. Does it need to be fixed?](https://www.hearth.com/talk/data/attachments/269/269198-90163b861d6765d806823765bb01d819.jpg)
![Piece of stove cement broke off. Does it need to be fixed? Piece of stove cement broke off. Does it need to be fixed?](https://www.hearth.com/talk/data/attachments/269/269199-951c74155e0bec189a604f5dfae74912.jpg)