---
product_id: 46923635
title: "NP-1 Polyurethane Sealant Caulking 10.1 oz tube"
brand: "masterseal"
price: "KSh7566"
currency: KES
in_stock: true
reviews_count: 8
url: https://www.desertcart.co.ke/products/46923635-np-1-polyurethane-sealant-caulking-10-1-oz-tube
store_origin: KE
region: Kenya
---

# Cures in 7 days Waterproof seal 1.0 lb weight NP-1 Polyurethane Sealant Caulking 10.1 oz tube

**Brand:** masterseal
**Price:** KSh7566
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal the Deal with MasterSeal!

## Quick Answers

- **What is this?** NP-1 Polyurethane Sealant Caulking 10.1 oz tube by masterseal
- **How much does it cost?** KSh7566 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/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

- • **Quick and Easy:** No batteries required; just apply and let it cure!
- • **Durable Material:** Crafted from high-quality polyurethane for long-lasting performance.
- • **Seal with Confidence:** MasterSeal NP-1 offers a robust, waterproof seal for all your projects.
- • **Versatile Application:** Perfect for walls, windows, doors, sinks, and tubs.
- • **Proudly Made in the USA:** Support local manufacturing with every tube you use.

## Overview

The MasterSeal NP-1 Polyurethane Sealant is a high-performance caulking solution designed for various surfaces, including walls, windows, and tubs. Weighing just 1.0 lb and featuring a waterproof formula, it cures fully in 7 days, ensuring a durable and reliable seal for your 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

## 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 |
|---------------|-------|
| Color | Stone |
| Brand | MasterSeal |
| Item Weight | 10.1 Ounces |
| Liquid Volume | 10.1 Fluid Ounces |
| Full Cure Time | 7 Days |
| Item Form | Liquid |
| Surface Recommendation | ['Walls', 'Window', 'Door', 'Sink', 'Tub'] |
| Water Resistance Level | Waterproof |
| Number of Items | 1 |
| Manufacturer | MasterSeal |
| UPC | 080492301564 |
| Global Trade Identification Number | 00080492301564 |
| Unit Count | 10.0 Ounce |
| Material | Polyurethane |
| Part Number | NP1LMSTN |
| Item Weight | 10.1 ounces |
| Product Dimensions | 2 x 2 x 12.25 inches |
| Item model number | 1025610 |
| Size | Small |
| Item Package Quantity | 1 |
| Included Components | Hardware; Glue;hardware-sealers |
| Batteries Included? | No |
| Batteries Required? | No |
| Warranty Description | Warranty |

## 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

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ Exactly what I expected and worked great
*by B***  on May 29, 2020*

I purchased for work in my sealed crawlspace. I checked the date code before using and was about 7 months old. Worked great for me.

### ⭐⭐⭐⭐⭐ Good Quality and a Good Price
*by A***R on November 27, 2018*

My Primary use is for Caulking the Metal Brackets that Hold the Roofing material to the Brick Parapet Walls.but, It's handy to have for Caulking Mortar , Concrete, Cement, etc.When I need to add a Product to get Free Shipping, this NP1 caulk is always a possibility if I need it in inventory.

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

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*Product available on Desertcart Kenya*
*Store origin: KE*
*Last updated: 2026-02-21*