---
product_id: 671814
title: "High Heat Fire Resistant Mortar, 10 Oz, Black (7079818854)"
brand: "dap"
price: "¥4644"
currency: JPY
in_stock: true
reviews_count: 13
category: "Dap"
url: https://www.desertcart.jp/products/671814-high-heat-fire-resistant-mortar-10-oz-black-7079818854
store_origin: JP
region: Japan
---

# Easy water clean-up Withstands up to 2000°F ASTM E136 non-combustible certified High Heat Fire Resistant Mortar, 10 Oz, Black (7079818854)

**Brand:** dap
**Price:** ¥4644
**Availability:** ✅ In Stock

## Summary

> 🔥 Seal the heat, stop the threat — fireproof your space like a pro!

## Quick Answers

- **What is this?** High Heat Fire Resistant Mortar, 10 Oz, Black (7079818854) by dap
- **How much does it cost?** ¥4644 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/671814-high-heat-fire-resistant-mortar-10-oz-black-7079818854)

## Best For

- dap enthusiasts

## Why This Product

- Trusted dap brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Clean & Convenient:** Water-based formula cleans up effortlessly—no harsh chemicals needed
- • **Ultimate Heat Shield:** Endures scorching 2000°F temperatures without breaking a sweat
- • **Seamless Masonry Bond:** Adheres rock solid to firebrick, sealing cracks and joints flawlessly
- • **Certified Fireblock Power:** Meets ASTM E136 standards for unbeatable fire resistance
- • **Interior-Ready & Paintable:** Low odor and paintable once cured, perfect for stylish indoor projects

## Overview

DAP High Heat Fire Resistant Mortar is a black silicate cement paste designed for wood-frame construction and fireplace repairs. Certified non-combustible per ASTM E136, it withstands extreme heat up to 2000°F, bonds firebricks securely, and cleans up easily with water. Ideal for interior use, it sets rock hard when fired and is paintable, making it the go-to sealant for fire safety and durability.

## Description

Product Description DAP High Heat Fire Resistant Mortar is a non-combustible silicate cement for applications in wood frame construction where an ASTM E136 non-combustible sealant is required, such as filling around vents, pipes, ducts and chimneys at ceiling and/or floor level prior to the application of drywall products. It was tested in accordance with ASTM E136 and withstands temperatures up to 2000 degrees Fahrenheit. It can also be used to patch chipped or cracked firebrick in fireplaces or wood-burning stoves. Adheres firmly to firebrick when wet or dry and sets rock hard when fired. Easy water clean-up. Works for interior uses. From the Manufacturer A non-combustible silicate cement for applications in wood-frame construction where and ASTM E 136 sealant is required. Can also be used for patching and sealing around fireplaces and wood-burning stoves. Withstands temperatures up to 2000 degrees F. Sets rock hard when fired. Easy water clean-up. For interior use only.

Review: creates a good seal - worked very well. I used it to seal joints on a wood stove pipe. After applying it appeared to flow into the seam creating a good seal. Wish they made it in a smaller tube, I have a lot left over.
Review: Works well on pellet grills - This high heat mortar worked great. I was getting water that would leak between the pellet hopper and grill on my Pitboss pellet grill. I ordered this and used it to seal the gap between the grill and hopper. I also used this to seal between the grill and shelf to stop Walter from running down and filling my drippings bucket. This works great and is holding up well in the high heat areas touching the grill.

## Features

- Draft, smoke, fireblock sealant for applications in wood-frame construction where an ASTM E136 non-combustible sealant is required
- Non-combustible silicate cement fireplace sealant repairs small chips or cracked fire brick, re-points mortar joints between fire bricks and bonds fire bricks together in fireplaces and wood burning stoves
- Fire stop sealant cleans up easily with water and sets rock hard once fired
- Sealant adheres well to masonry and is paintable once heat cured
- Low odor sealant can be used for interior applications

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0006MXS4C |
| Best Sellers Rank | #2,096 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Fire Barrier Caulk #14 in Industrial Sealants |
| Brand | DAP |
| Color | Black |
| Date First Available | February 17, 2007 |
| Department | Unisex-Adult |
| Full Cure Time | 1 to 2 at 500 Degrees Fahrenheit Hours |
| Global Trade Identification Number | 00070798188549 |
| Initial Hardening Time | 24 Hours |
| Is Discontinued By Manufacturer | No |
| Item Form | Paste |
| Item Weight | 10.1 ounces |
| Item model number | 7079818854 |
| Liquid Volume | 10 |
| Manufacturer | DAP Products Inc. |
| Material | Silicate Cement |
| Maximum Gap Fill | 0.06 Inches |
| Number of Items | 1 |
| Product Dimensions | 11.5 x 2 x 2 inches |
| Surface Recommendation | Interior |
| Temperature Range | 40 to 100 Degrees Fahrenheit |
| UPC | 070798188549 |
| Unit Count | 10.1 Ounce |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** DAP
- **Color:** Black
- **Full Cure Time:** 1 to 2 at 500 Degrees Fahrenheit Hours
- **Item Weight:** 0.63 Pounds
- **Liquid Volume:** 10

## Images

![High Heat Fire Resistant Mortar, 10 Oz, Black (7079818854) - Image 1](https://m.media-amazon.com/images/I/61ZlRnVApxL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: I'm looking to attach some tin tiles to sheetrock. Think this will work?**
A: I think that you would have better results using the following item: "Dap 27450 Beats The Nail All-Purpose Construction Adhesive 10.3-Ounce".  Make sure that you remove any oily film that may be on the tin before applying the construction adhesive.

**Q: Can this be used to install wood stove door gaskets?**
A: YES!

**Q: Is the item waterproof? Can it be used outside for repairs in all weather conditions?**
A: Yes it is waterproof.
I used it around my flue pipe on the roof.
Stuff works great. I would do 2 layers instead of one.

**Q: Has anyone had success with this product without fire curing?  Manufacturer says it must be fire cured but I need a fire seal of 2000F+ but can't fire**
A: I used this to seal the storm collar and flashing around my class A chimney penetrating through my roof.  That installation definitely was not fire-cured, and has held up extremely well.  It does cure very hard, but has performed well for my application.  I check, the seals when I clean my chimney every year, and 11-years in all is still well.

## Customer Reviews

### ⭐⭐⭐⭐⭐ creates a good seal
*by J***D on January 13, 2026*

worked very well. I used it to seal joints on a wood stove pipe. After applying it appeared to flow into the seam creating a good seal. Wish they made it in a smaller tube, I have a lot left over.

### ⭐⭐⭐⭐⭐ Works well on pellet grills
*by J***. on December 1, 2025*

This high heat mortar worked great. I was getting water that would leak between the pellet hopper and grill on my Pitboss pellet grill. I ordered this and used it to seal the gap between the grill and hopper. I also used this to seal between the grill and shelf to stop Walter from running down and filling my drippings bucket. This works great and is holding up well in the high heat areas touching the grill.

### ⭐⭐⭐⭐⭐ Good
*by P***S on November 14, 2025*

Good product but bad US postal shipping

## Frequently Bought Together

- DAP 7079818854 High Heat Mortar Fire Stop Caulk, 10 Fluid Ounces, Black
- Minuteman International Cast Iron Clean-Out Door, 8 by 8-Inch,Black
- Minuteman International Cast Iron Ash Dump, Black

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**Shop now:** [https://www.desertcart.jp/products/671814-high-heat-fire-resistant-mortar-10-oz-black-7079818854](https://www.desertcart.jp/products/671814-high-heat-fire-resistant-mortar-10-oz-black-7079818854)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-07*