Ceramic insulation vs Fiberglas rope gasket.

[Muskytooth]

Hello everyone. Newbie here.....second year doing this. I built a really nice stove this year and I have two pans. 28.5 x 40 with a ball valve that runs into a 28.5 x 24 to finish it off. I have been using a ceramic insulation to fill the space between the two pans and it works very well but I am wondering if I could use a fiberglass gasket in it's place? Are there any opinions on this at all? Here is a picture...... (https://flic.kr/p/rG6C7b) You can see a quick video of link to my stove here. (https://youtu.be/qD03Twuf6F0)

Thanks for any insight you can offer.

[RileySugarbush]

Both work. The rope is stronger so it hold up better and can last for years, but it is also stiffer and may not conform as well so might leak a bit. Thin strips of ceramic seal better, but will probably not survive taking the pan off very many times.