---
product_id: 400019535
title: "Stone Polyurethane Caulk"
brand: "masterseal np1"
price: "€ 83.55"
currency: EUR
in_stock: true
url: https://www.desertcart.es/products/400019535-stone-polyurethane-caulk
store_origin: ES
region: Spain
---

# 30-day shelf life Weather-resistant Durable sealant Stone Polyurethane Caulk

**Brand:** masterseal np1
**Price:** € 83.55
**Availability:** ✅ In Stock

## Summary

> Seal the deal with confidence! 🔒

## Quick Answers

- **What is this?** Stone Polyurethane Caulk by masterseal np1
- **How much does it cost?** € 83.55 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/400019535-stone-polyurethane-caulk)

## 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

- • **Versatile Use:** Perfect for both indoor and outdoor projects, ensuring a professional finish.
- • **Quick Application:** Easily apply with a standard caulking gun for efficient sealing.
- • **Ultimate Durability:** Crafted for long-lasting performance in any environment.
- • **User-Friendly Design:** Unopened tubes guarantee freshness, ensuring optimal performance.
- • **Weatherproof Protection:** Resists moisture and extreme temperatures, safeguarding your surfaces.

## Overview

MasterSeal NP1 Stone Polyurethane Caulk is a high-performance sealant designed for both indoor and outdoor applications. With a 30-day shelf life and weather-resistant properties, it ensures a durable and professional finish for all your sealing needs.

## Description

MasterSeal NP1 Stone Polyurethane Caulk

## Features

- Shelf-life item - No returns after 30 days
- Only unused/unopened tubes may be returned

## 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

![Stone Polyurethane Caulk - 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

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**Shop now:** [https://www.desertcart.es/products/400019535-stone-polyurethane-caulk](https://www.desertcart.es/products/400019535-stone-polyurethane-caulk)

---

*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-01-22*