

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.
🔥 Seal the heat, secure your space — fireproof like a pro!
DAP High Heat Fire Resistant Mortar is a black silicate cement paste designed for interior wood-frame construction and fireplace repairs. Certified non-combustible per ASTM E136, it withstands extreme heat up to 2000°F, bonds firebrick and masonry, and offers easy water clean-up with low odor. Trusted by thousands, it’s the go-to firestop sealant for professionals demanding safety and durability.



| ASIN | B0006MXS4C |
| Best Sellers Rank | #5,629 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Fire Barrier Caulk #49 in Industrial Sealants |
| Brand | DAP |
| Brand Name | DAP |
| Color | Black |
| Compatible Material | Wood, Masonry, Firebrick |
| Customer Reviews | 4.5 out of 5 stars 2,433 Reviews |
| Global Trade Identification Number | 00070798188549 |
| Included Components | 1 Tube |
| Item Dimensions | 11.5 x 2 x 2 inches |
| Item Form | Paste |
| Item Type Name | Mortar |
| Item Weight | 10.08 ounces |
| Item dimensions L x W x H | 11.5 x 2 x 2 inches |
| Manufacturer | DAP |
| Material | Silicate Cement |
| Material Type | Silicate Cement |
| Model | 7079818854 |
| Number of Items | 1 |
| Part Number | 7079818854 |
| Style | Tube |
| Style Name | Tube |
| Surface Recommendation | Interior |
| UPC | 070798188549 |
| Unit Count | 10.1 Ounce |
| Warranty Description | Warranty |
| Water Resistance Level | Waterproof |
E**E
Great
Perfect for fixing cracked up fire pit
C**E
Great For Broken Ceramic Logset
I have something called a little red campfire that has these parts one of which is a log set. The log set got broken and I decided to try this adhesive to do the repair. I am heat curing it by simply using the campfire. So far everything seems to be working quite well.
J**Y
Worked great but it’s messy, wear gloves!!
This high-heat mortar worked great for my project and was easy to apply. It was thinner than I expected, so it can be a little messy to work with and really likes to get all over your hands. I wish gloves were included. Overall, it performed well, filled in the cracks between bricks. Dried overnight (but I gave it a few days before I lit the fireplace), did the job, and is a good value for the price.
B**G
Blends seamlessly into fireplace door and surrounding cement.
I had my house painted and the professional painter asked me to get 2 tubes of the high heat mortar. I noticed that he used only half of one cartridge but took the rest with him at the end of the job. I guess he liked it as well as I did.
G**S
High heat cement
This product was exactly what I was looking for. My outdoor pizza oven needed some bricks back in place. It worked perfectly. Great adhesive.The price was reasonable. Arrived on time. Definitely buying again.
O**E
undurable
will last until it does not
F**W
Get the job done
Get the job done, slightly complaint is it is black color instead of white, my first time repair work was done successfully, firm and sturdy
S**A
High heat mortar
These went on easy enough to close a small gap in the pipe that attaches to my wood stove but even though I followed the directions and let it cure before building a fire, I have found some of the mortar has dried and flaked off leaving a fee pinholes around the pipe. I will reapply in the summer when I can leave it to cure for a few weeks instead of a few days and see if that helps. It did go on fairly smoothly and the black color blended in well with the pipe but if it doesn't hold up to the high heat it wont be worth the money.
6**A
Very good product for our application.
Comes out a little runny but has held up well and works on the cracks in our chimney. I “v’d” the cracks to get better adhesion and all is good.
T**Y
Five Stars
Worked great for me.
T**E
Chiminea fire pit
I think this would be great for the right job. Bought this to try on a clay chiminea fire pit. It sealed filed in the cracks for sure but didn’t seal it the way I was hoping. I honestly don’t think it’s for this but I wanted to give it a try as I love the fire chiminea pit
T**O
A bit messy to use, but it works well
Used this to repair some minor cracks and a few small broken areas of mortar in my fireplaces. It is a bit sticky, sometimes preferring to stick to the tube and to fingers rather than to the mortar, thus it was a bit more difficult to apply than I had expected. However, overall it has stayed solidly in place after several fires in the fireplace, and it looks good.
S**M
Two Stars
Followed the instructions perfectly but the seal gave away just after two days.
Trustpilot
3 weeks ago
3 weeks ago