VEVOR Propane Knife Forge, Blacksmithing Forge with Single Burner, Portable Propane Forge with an Open Structure, Large Capacity Farrier Forge, Square Propane Burner Forge for Knife and Tool Making

Hello, I suggest you purchase a high-temperature cotton curing agent to apply. Using a curing agent can reduce volatilization and extend the service life of the high-temperature cotton. You can purchase refractory cement or curing agent that can withstand temperatures greater than 2700℉. If you do not purchase a curing agent, it will not affect the function of the furnace. You can also feel more at ease wearing a mask when using it.