---
product_id: 14439147
title: "MasterSeal NP1 10.1 Oz. Polyurethane Sealant, Stone"
brand: "masterseal np1"
price: "₹ 3977"
currency: INR
in_stock: true
category: "Master Seal Np1"
url: https://www.desertcart.in/products/14439147-masterseal-np1-10-1-oz-polyurethane-sealant-stone
store_origin: IN
region: India
---

# 24h Full Cure Time 100% Waterproof 300 psi Tensile Strength MasterSeal NP1 10.1 Oz. Polyurethane Sealant, Stone

**Brand:** masterseal np1
**Price:** ₹ 3977
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal smart, seal strong — MasterSeal NP1 keeps your projects flawless and future-proof!

## Quick Answers

- **What is this?** MasterSeal NP1 10.1 Oz. Polyurethane Sealant, Stone by masterseal np1
- **How much does it cost?** ₹ 3977 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.in](https://www.desertcart.in/products/14439147-masterseal-np1-10-1-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

- • **Durable Elasticity:** Maintains permanent flexibility to withstand expansion and contraction without cracking.
- • **No-Fuss Application:** One-component, gun-grade formula with no mixing or priming needed for most surfaces.
- • **Trusted Performance:** Backed by BASF quality and a 4.6-star rating from nearly 200 pros.
- • **Seamless Versatility:** Perfect for active joints on walls, floors, windows & more—interior or exterior.
- • **Stone-Colored Sophistication:** Blends effortlessly with natural stone and masonry for a clean, professional finish.

## Overview

MasterSeal NP1 is a high-performance, moisture-curing polyurethane sealant designed for demanding construction needs. Offering 300 psi tensile strength and full waterproofing, it cures in 24 hours and bonds effortlessly to concrete, masonry, aluminum, and wood without priming. Ideal for both vertical and horizontal joints, it delivers permanent elasticity and a stone color that complements natural materials, making it the go-to sealant for professionals seeking durability and ease.

## 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 |
|---------------|-------|
| ASIN | B00UMWTB8I |
| Best Sellers Rank | #114,207 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #301 in Adhesive Caulk |
| Brand | MasterSeal NP1 |
| Brand Name | MasterSeal NP1 |
| Color | Stone |
| Customer Reviews | 4.6 out of 5 stars 199 Reviews |
| Full Cure Time | 24 hours |
| Item Form | Liquid |
| Item Weight | 10.1 ounces |
| Liquid Volume | 10.1 fluid ounces |
| Manufacturer | BASF |
| Material Type | Polyurethane |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | NP1STONE |
| Surface Recommendation | Floor,Wall,Walls,Window |
| Tensile Strength | 300 psi |
| Unit Count | 1 Count |
| Water Resistance Level | Waterproof |

## Product Details

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

## Images

![MasterSeal NP1 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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.in/products/14439147-masterseal-np1-10-1-oz-polyurethane-sealant-stone](https://www.desertcart.in/products/14439147-masterseal-np1-10-1-oz-polyurethane-sealant-stone)

---

*Product available on Desertcart India*
*Store origin: IN*
*Last updated: 2026-09-28*