---
product_id: 14439147
title: "10.1 Oz. Polyurethane Sealant, Stone"
brand: "masterseal np1"
price: "VT8441"
currency: VUV
in_stock: true
reviews_count: 8
url: https://www.desertcart.vu/products/14439147-10-1-oz-polyurethane-sealant-stone
store_origin: VU
region: Vanuatu
---

# 10.1 fl oz 10.1 oz weight Waterproof 10.1 Oz. Polyurethane Sealant, Stone

**Brand:** masterseal np1
**Price:** VT8441
**Availability:** ✅ In Stock

## Summary

> Seal the Deal! 🛠️

## Quick Answers

- **What is this?** 10.1 Oz. Polyurethane Sealant, Stone by masterseal np1
- **How much does it cost?** VT8441 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/14439147-10-1-oz-polyurethane-sealant-stone)

## Best For

- masterseal np1 enthusiasts

## Why This Product

- Trusted masterseal np1 brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Easy Application:** User-friendly liquid form for seamless application.
- • **Permanent Elasticity:** Stays flexible, adapting to movement without cracking.
- • **Unmatched Versatility:** Perfect for both interior and exterior applications.
- • **Multi-Surface Compatibility:** Adheres to concrete, masonry, aluminum, and wood.
- • **Weather-Resistant Performance:** Designed to withstand the elements, rain or shine.

## Overview

MasterSeal NP1 is a high-performance polyurethane sealant that offers permanent elasticity and exceptional waterproofing. Ideal for a variety of applications, it adheres to multiple surfaces, making it the go-to choice for professionals tackling both interior and exterior projects.

## Description

MasterSeal NP 1 is a one-component, high-performance, non-priming, gun-grade, elastomeric polyurethane sealant. It requires no mixing and typically requires no priming to bond to many materials, including concrete and masonry.

## Features

- MasterSeal NP1 10.1 Oz. Polyurethane Sealant, Stone
- A versatile moisture-curing high-performance polyurethane sealant with permanent elasticity (Formerly: Sonolastic NP 1).
- or use on active, vertical and horizontal interior, exterior joints including expansion wall joints, floor and pavement joints, curtain walls, panel walls, precast walls,
- window frames, structural components, dams, spillways, and storm water drains. Substrates include concrete, masonry, aluminum, and wood.
- Pack of 1

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Liquid Volume | 10.1 Fluid Ounces |
| Item Weight | 10.1 Ounces |
| Water Resistance Level | Waterproof |
| Surface Recommendation | Floor,Wall,Walls,Window |
| Item Form | Liquid |
| Color | Stone |
| Material Type | Polyurethane |

## Product Details

- **Color:** Stone
- **Brand:** MasterSeal NP1
- **Item Weight:** 10.1 Ounces
- **Liquid Volume:** 10.1 Fluid Ounces
- **Full Cure Time:** 24 Hours

## Images

![10.1 Oz. Polyurethane Sealant, Stone - Image 1](https://m.media-amazon.com/images/I/31duoo2CfqL.jpg)

## Questions & Answers

**Q: what does 'stone' mean? color? or material its used on?**
A: Stone is the color of the caulk.  I used it in my pool where the copping joined the top row of tiles.  It matched the color in the copping.  You can purchase it in colors other than "stone."  Hope this helps.

**Q: If left unpainted, does this sealant tend to attract dirt outdoors, or does it stay clean and white?**
A: Clean and white.

**Q: Is this product heat resistant?**
A: It is made for outside use and I have used it to seal around replacement windows.  I don't see anything on the label that specifies its heat resistance.

**Q: can i use this to fill gaps in my stone fireplace mantle and then paint it ?**
A: Very good product for stone, this is not for beginners Very sticky, not shire what heat temperatures are

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great, with a caveat
*by R***D on August 4, 2023*

I have used this twice.First, I installed a modern awning above an exterior door and to prevent water coming through the small gap between the awning and the wall it was attached to, I used this sealant. It worked great! It completely stopped rain from running down the door.So I tried it again. This time to fill the gaps between a flat linear shower drain and the tiles surrounding it. Again, it sealed the area completely and water from the shower now flows down the drain with no issues . Before, some water was going into the crevices left by the tile installer.Problem is, as other reviewers stated, the material is thick and requires some prep work in order to achieve a clean outcome. Yes, have lots of paper tissue or rugs available. You will be cleaning your hands/fingers all the time. Yes, have blades from a utility knife available to clean any excess. Don't forget to use painter's tape to protect the areas you don't want to have this sticky material on. And, specially, work slowly. Be patient. The thick material is not entirely a bad thing. It will allow you to shape things as you need/want. I required a 45 degree angle for the water to flow from the shower flow into the flat linear shower drain and the thickness made it easier. If you are a detailed-oriented person, you are going to like this product.

### ⭐⭐⭐⭐⭐ Good product
*by P***. on November 16, 2024*

Good concrete crack sealer. Stays flexible

### ⭐⭐⭐⭐⭐ Great sealent
*by B***S on June 24, 2025*

Water was getting into my basement. I used this between my foundation wall and sidewalk. There was about a quarter inch gap between the two. It stopped the water from seeping between. My basement is now dry. It has last at least two seasons.WARNING: It is thick! At first I thought it was all dried up. No, it was just that tick. You will have to have very strong hands to squeeze the caulking gun. But it is worth it.

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**Shop now:** [https://www.desertcart.vu/products/14439147-10-1-oz-polyurethane-sealant-stone](https://www.desertcart.vu/products/14439147-10-1-oz-polyurethane-sealant-stone)

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-02-13*