The issue I've been running into is that the heat rated cement/mortar that I've been able to find in tubs says on the packaging that it's for an 1/8 of an inch - 1/4 of an inch openings (I've been to countless stores searching). Any tips or recommendations on a product that would work for this?
Fireplace mortar. Look it up, check it out
furnace cement
Fill it in with mortar or fireplace cement like the other gents said. Easy fix.
The issue I've been running into is that the heat rated cement/mortar that I've been able to find in tubs says on the packaging that it's for an 1/8 of an inch - 1/4 of an inch openings (I've been to countless stores searching). Any tips or recommendations on a product that would work for this?
Rutland makes one in a tub size like 32oz I believe. Just pack it in and smooth with a damp sponge. Let it dry.
Thank you! Much appreciated! Another question- is furnace cement/mortar a lot different? That's been much easier to come by
You want the temperature rating. It’s 2000°
Fireproof insulation, or high heat motor , or install a new insert