---
product_id: 18312921
title: "300016 Masonry Crack and Concrete Joint Filler – Elastomeric & Waterproof Mortar Repair Sealant for Chimneys, Joints of Brick, Block & Stone Walls – 1 Pint"
brand: "chimneyrx"
price: "€ 89.74"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.it/products/18312921-300016-masonry-crack-and-concrete-joint-filler-elastomeric-and-waterproof
store_origin: IT
region: Italy
---

# Durable waterproof elastomeric barrier Seals cracks up to 1/8 inch Dries clear in 2 hours 300016 Masonry Crack and Concrete Joint Filler – Elastomeric & Waterproof Mortar Repair Sealant for Chimneys, Joints of Brick, Block & Stone Walls – 1 Pint

**Brand:** chimneyrx
**Price:** € 89.74
**Availability:** ✅ In Stock

## Summary

> 🧱 Seal Smart, Stay Dry – Repair Like a Pro!

## Quick Answers

- **What is this?** 300016 Masonry Crack and Concrete Joint Filler – Elastomeric & Waterproof Mortar Repair Sealant for Chimneys, Joints of Brick, Block & Stone Walls – 1 Pint by chimneyrx
- **How much does it cost?** € 89.74 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/18312921-300016-masonry-crack-and-concrete-joint-filler-elastomeric-and-waterproof)

## Best For

- chimneyrx enthusiasts

## Why This Product

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

## Key Features

- • **Invisible Restoration:** Maintains original masonry aesthetics with a clear, translucent finish that blends seamlessly over time.
- • **Fast & Easy Application:** Brush-on formula dries quickly within 2 hours, enabling rapid project turnaround in a wide temperature range.
- • **Precision Crack Sealing:** Effectively repairs mortar joints and masonry cracks up to 1/8 inch, preventing costly structural damage.
- • **High Coverage Efficiency:** One pint covers up to 110 bricks or 25 sq. ft., delivering professional-grade results with minimal product waste.
- • **Weatherproof & Breathable:** Elastomeric formula blocks water infiltration while allowing moisture vapor escape to avoid future cracking.

## Overview

The 300016 Masonry Crack and Concrete Joint Filler by ChimneyRx is a 1-pint elastomeric sealant designed for durable, waterproof repair of cracks up to 1/8 inch in chimneys, brick, block, and stone walls. It forms a weather-resistant yet breathable barrier that prevents water damage without altering masonry appearance. Quick-drying and easy to apply, it offers efficient coverage for professional-quality masonry restoration.

## Description

300016 Masonry Crack and Concrete Joint Filler – Elastomeric & Waterproof Mortar Repair Sealant for Chimneys, Joints of Brick, Block & Stone Walls – 1 Pint

## Features

- SEALS CRACKS & GAPS: ChimneyRx concrete crack filler repairs cracks up to 1/8” in mortar joints on chimneys, brick walls and between concrete masonry units while also sealing larger cracks and defects that water repellents alone can’t fix
- DURABLE WATERPROOF PROTECTION: Unlike traditional cement crack fillers, our elastomeric concrete joint sealant creates a long-lasting, weather-resistant barrier that blocks water while allowing moisture vapors to escape, helping prevent future cracks
- COST-EFFECTIVE REPAIR & WON'T ALTER MASONRY LOOK: Fix leaks without expensive tuckpointing or grouting; our brick mortar crack filler solution won’t noticeably change masonry appearance; a slight gloss may appear on dense surfaces but fades over time
- EASY APPLICATION & QUICK DRYING: Apply this concrete filler with a brush in 40-100°F temperatures; it dries in 2 hours to a clear, translucent, milky film, blending seamlessly for brick mortar repair
- EFFICIENT COVERAGE: One pint of this cement joint filler treats mortar joints around 110 standard bricks or 25 sq. ft. of wall surface, providing excellent coverage for masonry and concrete repair tasks

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Concrete |
| Brand | CHIMNEYRX |
| Style | Compact |
| Item dimensions L x W x H | 8 x 8 x 8 inches |
| Compatible Material | Concrete, Stone |
| Water Resistance Level | Waterproof |
| Item Form | Liquid |
| UPC | 709057700160 |
| Unit Count | 19.21 Ounce |
| Number of Items | 1 |
| Color | clear |
| Surface Recommendation | Wall |
| Product Dimensions | 8 x 8 x 8 inches |
| Item Weight | 1.26 pounds |
| Manufacturer | ChimneySaver |
| ASIN | B006BKU5P8 |
| Item model number | B006BKU5P8 |
| Is Discontinued By Manufacturer | No |
| Date First Available | November 22, 2011 |

## Product Details

- **Material:** Concrete
- **Brand:** CHIMNEYRX
- **Style:** Compact
- **Item dimensions L x W x H:** 8 x 8 x 8 inches
- **Compatible Material:** Concrete, Stone

## Images

![300016 Masonry Crack and Concrete Joint Filler – Elastomeric & Waterproof Mortar Repair Sealant for Chimneys, Joints of Brick, Block & Stone Walls – 1 Pint - Image 1](https://m.media-amazon.com/images/I/61WmII034yL.jpg)
![300016 Masonry Crack and Concrete Joint Filler – Elastomeric & Waterproof Mortar Repair Sealant for Chimneys, Joints of Brick, Block & Stone Walls – 1 Pint - Image 2](https://m.media-amazon.com/images/I/41L+OJeseyL.jpg)
![300016 Masonry Crack and Concrete Joint Filler – Elastomeric & Waterproof Mortar Repair Sealant for Chimneys, Joints of Brick, Block & Stone Walls – 1 Pint - Image 3](https://m.media-amazon.com/images/I/71qS7uB+RjL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Temporary seal
*by S***G on December 2, 2024*

Worked really well to temporarily seal our chimney to stop leaks

### ⭐⭐⭐⭐⭐ Saved me thousands
*by M***. on January 23, 2015*

Saved me thousands in repairs to the chimney.Noticed that the chimney was wet in the attic area and had a drip inside of the fireplace. Was very concerned and called around to multiple repair men and was qouted well above $1000 to repair it. I did the repairs myself in multiple stages. This was about stage three when I discovered some cracks. Applied this to the chimney and boom all problems disappered.I will tell you this doing it yourself and ensuring that you have the right product for the right problem is key.

### ⭐⭐⭐⭐⭐ but it goes on easy.
*by L***  on September 26, 2017*

I have not applied to all the chimney's mortar joints yet, but it goes on easy.

## Frequently Bought Together

- ChimneyRx 300016 Masonry Crack and Concrete Joint Filler – Elastomeric & Waterproof Mortar Repair Sealant for Chimneys, Joints of Brick, Block & Stone Walls – 1 Pint
- ChimneyRx 300014 Brushable Chimney Crown Repair – Elastomeric & Waterproof Coating for Crowns & Masonry - Fast-Setting & Long-Lasting Protection Crack & Leak Prevention - 1 Gallon
- ChimneyRx 300119 Masonry Chimney Water Repellent - Siloxane Based, Non-Film-Forming, Breathable, and Transparent Waterproof Coating for Brick Chimneys & Other Vertical Surfaces - 1 Gallon

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.it/products/18312921-300016-masonry-crack-and-concrete-joint-filler-elastomeric-and-waterproof](https://www.desertcart.it/products/18312921-300016-masonry-crack-and-concrete-joint-filler-elastomeric-and-waterproof)

---

*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-01-23*