DAP 7079818854 High Heat Mortar Fire Stop Caulk, 10 Fluid Ounces, Black

works great.

Works great

I just wanted to seal up around the fireplace insert. You could feel the cool air coming in. I bought two lucky, I needed them both. It said that you needed to start fire to dry it but, looking it up on line it said to just wait 24 hours for it to dry.

We used this high heat caulk on our chimney for my wood cooking stove. We used it to seal up the chimney collar to keep the rain and snow from coming inside the pipe.

The media could not be loaded. I got scared away by other brands due to their reveiws so I picked the cheapest option and i am beyond happy. There's no more smoke pouring out of my chimney and there's no smell! It did bubble up but I got the fire a little too hot and im not concerned about what this looks like

I used it to seal around a fire pit. After several uses, it started to Crack and flake off in chunks.

I have used this product for the past 30 years. My home is 50 years old. Overtime mortar becomes cracked and worn away. This is a necessity for protecting your fireplace from gaps inside. It works well.

This works fantastic for my purpose. In my basement is a woodstove with one of those god-awful chimneys that has all the segmented sections that let’s air in to create creosote or in the summer if it reverses it let’s smoke smell out. After I took it apart and cleaned it thoroughly I put this stuff on each section as I was putting it back together. Keep a bunch of wet paper towels are wet rags handy as you wipe excess off with your fingers as you go. I’d say in 15 to 20 minutes it was semi hard. Then I just started a fire to fire the material. I have no smoke smell anymore. The draft is stronger to because there’s not air leakage. Over the next few days of having fires the excess that I didn’t quite wipe off or crack and fall to the ground but the stuff in the joints is staying strong. It’s not the prettiest up close but when you’re not standing right next to it you really don’t notice it. it dries to a very dark charcoal gray almost black. If I’ve gone slower I could’ve made it much less messy. It shows up more in the picture than it does in real life. You could definitely paint it with grill paint if you want to do afterwards. A+, five stars, two thumbs up, would play with grey fire smoo again!