---
product_id: 46923635
title: "NP-1 Polyurethane Sealant Caulking 10.1 oz tube"
brand: "masterseal"
price: "18881CFA"
currency: XOF
in_stock: true
reviews_count: 8
category: "Master Seal"
url: https://www.desertcart.sn/products/46923635-np-1-polyurethane-sealant-caulking-10-1-oz-tube
store_origin: SN
region: Senegal
---

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

**Brand:** masterseal
**Price:** 18881CFA
**Availability:** ✅ In Stock

## Summary

> 💧 Seal smart, seal strong — MasterSeal your space with confidence!

## Quick Answers

- **What is this?** NP-1 Polyurethane Sealant Caulking 10.1 oz tube by masterseal
- **How much does it cost?** 18881CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/46923635-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

- • **Effortless Application:** Smooth flow formula designed for easy, no-tool application
- • **Precision 10.1 oz Tube:** Perfectly sized for targeted sealing jobs without waste
- • **American-Made Reliability:** Crafted in the USA for trusted durability and performance
- • **Long-Lasting Waterproof Seal:** Full cure in 7 days ensures a resilient, weatherproof finish
- • **Versatile Surface Compatibility:** Seals walls, windows, doors, sinks, and tubs effortlessly

## Overview

MasterSeal NP-1 Polyurethane Sealant Caulking is a 10.1 oz tube of premium waterproof sealant made in the USA. Designed for professional-grade sealing on multiple surfaces including walls, windows, doors, sinks, and tubs, it offers easy application with a smooth flow formula that requires no tooling. Fully cures in 7 days to provide a durable, weather-resistant finish, making it the go-to choice for millennial managers who demand efficiency and reliability in their home improvement projects.

## 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: Good sealant, easy to use - Needed a sealant for a small extra counter and this worked great.
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

## 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 | #70,505 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #102 in Adhesive Caulk #203 in Industrial Sealants #15,664 in Hardware |
| Brand | MasterSeal |
| Brand Name | MasterSeal |
| Color | Stone |
| Customer Reviews | 4.3 out of 5 stars 103 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 |
| Part Number | NP1LMSTN |
| Surface Recommendation | ['Walls', 'Window', 'Door', 'Sink', 'Tub'] |
| UPC | 080492301564 |
| Unit Count | 10.0 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

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good sealant, easy to use
*by A***H on September 4, 2025*

Needed a sealant for a small extra counter and this worked great.

### ⭐⭐⭐⭐⭐ 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

### ⭐⭐⭐⭐⭐ 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.sn/products/46923635-np-1-polyurethane-sealant-caulking-10-1-oz-tube](https://www.desertcart.sn/products/46923635-np-1-polyurethane-sealant-caulking-10-1-oz-tube)

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-07-09*