---
product_id: 46923635
title: "MasterSeal NP-1 Polyurethane Sealant Caulking 10.1 oz tube"
brand: "masterseal"
price: "110.15 DT"
currency: TND
in_stock: true
reviews_count: 8
category: "Master Seal"
url: https://www.desertcart.tn/products/46923635-masterseal-np-1-polyurethane-sealant-caulking-10-1-oz-tube
store_origin: TN
region: Tunisia
---

# Waterproof sealant 10.1 oz precision volume Made in USA quality MasterSeal NP-1 Polyurethane Sealant Caulking 10.1 oz tube

**Brand:** masterseal
**Price:** 110.15 DT
**Availability:** ✅ In Stock

## Summary

> 💧 Seal it like a pro — waterproof, durable, and effortlessly sleek!

## Quick Answers

- **What is this?** MasterSeal NP-1 Polyurethane Sealant Caulking 10.1 oz tube by masterseal
- **How much does it cost?** 110.15 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/46923635-masterseal-np-1-polyurethane-sealant-caulking-10-1-oz-tube)

## Best For

- masterseal enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Convenient:** 10.1 oz tube fits easily in your toolkit for on-the-go fixes
- • **Effortless Application:** Smooth, no-tool formula for a flawless seal every time
- • **Durable Waterproof Barrier:** Protects surfaces from moisture with a 7-day full cure
- • **Trusted American Craftsmanship:** Proudly made in the USA for consistent premium quality
- • **Versatile Surface Compatibility:** Perfect for walls, windows, doors, sinks, and tubs

## Overview

MasterSeal NP-1 is a 10.1 oz polyurethane sealant tube made in the USA, designed for waterproof sealing on multiple surfaces including walls, windows, and tubs. It cures fully in 7 days, offering a durable, easy-to-apply solution favored by professionals and DIYers alike.

## Description

Product Description MasterSeal NP-1 Polyurethane Sealant Caulking 10.1 oz tube From the Manufacturer MasterSeal NP-1 Polyurethane Sealant Caulking 10.1 oz

Review: Do not tool this this product when applying - This product applies very easily. Mine was an exterior project so be sure to apply slowly and do not tool this product or it will not work properly at sealing. Read the directions and watch a video on proper application (I watched a couple YouTube videos. I think you will be happy with this product both with the ease of application and with the functionality. Don’t over apply
Review: Incorrect color sent!!! Very different. - This is a great product !! I have used this for many years. Would recommend using a kitchen knife to tool it. Make sure you have the right color when you go to apply. The color is in fine print on the tube.

## Features

- Item Weight: 1.0 lb
- Country of Origin: United States
- Brand name: MasterSeal
- Item Dimensions: 2.0"L x 2.0"W x 12.25"H

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00AGZ04FK |
| Best Sellers Rank | #70,276 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #194 in Adhesive Caulk #393 in Industrial Sealants #32,271 in Hardware |
| Brand | MasterSeal |
| Brand Name | MasterSeal |
| Color | Stone |
| Customer Reviews | 4.4 out of 5 stars 106 Reviews |
| Full Cure Time | 7 days |
| Global Trade Identification Number | 00080492301564 |
| Included Components | Hardware; Glue;hardware-sealers |
| Item Form | Liquid |
| Item Type Name | 10 LMSTN PLYURTH SEALANT |
| Item Weight | 10.1 ounces |
| Liquid Volume | 10.1 fluid ounces |
| Manufacturer | MasterSeal |
| Material Type | Polyurethane |
| Model | 1025610 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | NP1LMSTN |
| Surface Recommendation | ['Walls', 'Window', 'Door', 'Sink', 'Tub'] |
| UPC | 080492301564 |
| Unit Count | 10 Ounce |
| Warranty Description | Warranty |
| Water Resistance Level | Waterproof |

## Product Details

- **Color:** Stone
- **Brand:** MasterSeal
- **Item Weight:** 10.1 Ounces
- **Liquid Volume:** 10.1 Fluid Ounces
- **Full Cure Time:** 7 Days

## Images

![MasterSeal NP-1 Polyurethane Sealant Caulking 10.1 oz tube - Image 1](https://m.media-amazon.com/images/I/510f-K61qYL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Do not tool this this product when applying
*by R***E on May 23, 2026*

This product applies very easily. Mine was an exterior project so be sure to apply slowly and do not tool this product or it will not work properly at sealing. Read the directions and watch a video on proper application (I watched a couple YouTube videos. I think you will be happy with this product both with the ease of application and with the functionality. Don’t over apply

### ⭐⭐⭐⭐⭐ Incorrect color sent!!! Very different.
*by A***I on June 19, 2026*

This is a great product !! I have used this for many years. Would recommend using a kitchen knife to tool it. Make sure you have the right color when you go to apply. The color is in fine print on the tube.

### ⭐⭐⭐⭐⭐ Light grey color - great flexible sealer.
*by S***C on May 17, 2020*

Not sure why whomever posted this product didn't include the color (of which there are quite a few - this one light grey (see image - I used it to seal a small hole / rusted area on the top of a repurposed metal sea / land container)). I recently had a hard time finding this product at the local big box building supply stores - it's a fantastic roofing sealer (et al) which sticks to almost everything but it MUST be a dry surface for proper adhesion. I have had the same results as others that have commented about one persistent problem regarding this product - sometimes it dries out inside the tube before it's first use rendering it worthless (I usually squeeze the tube before I purchase it but of course that can't be done with an online purchase). I use it on everything needing an incredibly strong but flexible and waterproof bonding / gap filler.

## Frequently Bought Together

- MasterSeal NP-1 Polyurethane Sealant Caulking 10.1 oz tube
- Primesource NP1 PolySeal Black 10oz Multi-Purpose Polyurethane Caulk 12 Count Water Resistant
- BASF Sealant NP1 Polyurethane White 10.1 Oz - Case of 30

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**Shop now:** [https://www.desertcart.tn/products/46923635-masterseal-np-1-polyurethane-sealant-caulking-10-1-oz-tube](https://www.desertcart.tn/products/46923635-masterseal-np-1-polyurethane-sealant-caulking-10-1-oz-tube)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-08-24*