---
product_id: 114366454
title: "Dap 18021 Concrete and Mortar Watertight Filler and Sealant - Gray 10.1-oz Cartridge (18096). Sold as 3 Pack"
brand: "dap"
price: "217 Lei"
currency: RON
in_stock: true
reviews_count: 8
category: "Dap"
url: https://www.desertcart.ro/products/114366454-dap-18021-concrete-and-mortar-watertight-filler-and-sealant-gray
store_origin: RO
region: Romania
---

# Paintable for seamless finish Silicone-enhanced water resistance 10.1 oz high-performance sealant Dap 18021 Concrete and Mortar Watertight Filler and Sealant - Gray 10.1-oz Cartridge (18096). Sold as 3 Pack

**Brand:** dap
**Price:** 217 Lei
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal it, protect it, perfect it — your concrete’s new best friend!

## Quick Answers

- **What is this?** Dap 18021 Concrete and Mortar Watertight Filler and Sealant - Gray 10.1-oz Cartridge (18096). Sold as 3 Pack by dap
- **How much does it cost?** 217 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/114366454-dap-18021-concrete-and-mortar-watertight-filler-and-sealant-gray)

## 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

- • **Value 3-Pack:** Bulk purchase offers better per-unit pricing, keeping your projects budget-friendly and efficient.
- • **Seamless Aesthetic:** Gray color blends naturally with concrete surfaces and is paintable to match any decor.
- • **Durable Crack Repair:** Latex-based formula ensures long-lasting sealing for concrete and mortar.
- • **Waterproof Protection:** Silicone additives deliver superior water resistance, perfect for indoor and outdoor use.
- • **Effortless Application:** Compact 10.1 oz cartridge designed for easy, mess-free sealing and smoothing.

## Overview

The Dap 18021 Concrete and Mortar Watertight Filler and Sealant is a 10.1 oz latex-based, silicone-enhanced sealant designed for durable crack repair in concrete and masonry. Its waterproof formula works indoors and outdoors, is paintable for a flawless finish, and comes in a convenient 3-pack for cost-effective, professional-grade sealing.

## Description

Dap 18096 10.1 oz. Concrete Waterproof Filler and Sealant, Gray. Sold as 3 Pack

Review: Great Product - I used this to seal cracks and joints in the foundation of my home (above and below grade) as well as between concrete walkways and the foundation. Very easy to apply and the final color blends in well. Also a better per-tube price than elsewhere. I found it helpful to give the applied bead (as well as my vinyl-gloved finger) a light spray of water first if I needed to smooth out the bead.
Review: Works good - Quality product, works good, shipped quickly

## Features

- Gray Concrete and Mortar Filler and Sealant 10.1 oz
- High performance, latex-based sealant.
- Formulated to repair cracks and holes in concrete, mortar and masonry.
- Contains silicone additives for improved adhesion and water resistance.
- Interior/exterior use. Paintable. Water clean-up.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07NDL2ZB2 |
| Best Sellers Rank | #41,297 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #78 in Silicone Adhesives |
| Brand | DAP |
| Brand Name | DAP |
| Color | GRAY |
| Compatible Material | Concrete |
| Customer Reviews | 4.4 out of 5 stars 2,213 Reviews |
| Item Dimensions | 8.25 x 6.25 x 12 inches |
| Item Form | Liquid |
| Item Height | 12 inches |
| Item Weight | 10.1 Ounces |
| Item dimensions L x W x H | 8.25 x 6.25 x 12 inches |
| Manufacturer | Dap Incorporated |
| Material | Silicone |
| Material Type | Silicone |
| Style | Compact |
| Style Name | Compact |
| Surface Recommendation | Concrete |
| Unit Count | 30.3 Fluid Ounces |
| Water Resistance Level | Waterproof |

## Product Details

- **Material:** Silicone
- **Brand:** DAP
- **Style:** Compact
- **Item Weight:** 10.1 Ounces
- **Item dimensions L x W x H:** 8.25 x 6.25 x 12 inches

## Images

![Dap 18021 Concrete and Mortar Watertight Filler and Sealant - Gray 10.1-oz Cartridge (18096). Sold as 3 Pack - Image 1](https://m.media-amazon.com/images/I/81VrAUFmhSL.jpg)

## Questions & Answers

**Q: Anyone used this on brick walls horizontal & vertical to repair mortar preventing water penetration due to cracked mortar?**
A: Yes.  For me has worked with cracks in our bricks.  Works well with other types  of concrete.  Have used it for Pavers  up against the house.

**Q: Can this be used as a caulk between the concrete patio and house concrete foundation to keep water away?**
A: Exactly what I used it for and the color match was decent enough not to look to bad. Have image will try and load somewhere, since they won’t allow you to here.

**Q: We have a 5" narrow crack in the cement basement floor that slowly, but continuously, seeps water. Can we still use this product?**
A: Wrong product. This is when you want the crack filler (available in quart bottle). You want to squeeze as much into the crack as possible. That said, given that it's continuously seeping water, you have hydrostatic pressure on the other side of that floor, and you need to deal with that or you will never have a permanent solution. This involves things like french drains and sump pumps. It is very common when water is flowing underground by your house.

**Q: Can I use it to fill/repair the gap around the toilet flange?**
A: I am not sure if this would work for filling gap at toilet flange.  I used it to seal cracks in patio.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Product
*by R***C on October 30, 2023*

I used this to seal cracks and joints in the foundation of my home (above and below grade) as well as between concrete walkways and the foundation. Very easy to apply and the final color blends in well. Also a better per-tube price than elsewhere. I found it helpful to give the applied bead (as well as my vinyl-gloved finger) a light spray of water first if I needed to smooth out the bead.

### ⭐⭐⭐⭐⭐ Works good
*by D***. on July 18, 2025*

Quality product, works good, shipped quickly

### ⭐⭐⭐⭐ Shrinkage is an issue
*by M***A on September 3, 2024*

I like the ease of application and it seems to dry in a reasonable amount of time. Shrinkage has been an issue, however. It looks great on day one, but on day two I come back to find holes in what was a smooth surface. A second application usually solves that issue, but in some areas I’ve even had to apply a third.

## Frequently Bought Together

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-09*