--- product_id: 16675567 title: "1025568 NP-1 Sealant One Part Urethane, Black, 10.1 Fl. Oz (Pack of 1)" brand: "masterseal" price: "R911" currency: ZAR in_stock: true reviews_count: 8 category: "Master Seal" url: https://www.desertcart.co.za/products/16675567-1025568-np-1-sealant-one-part-urethane-black-10-1 store_origin: ZA region: South Africa --- # Water resistant sealant Black polyurethane formula 10.1 fl. oz compact size 1025568 NP-1 Sealant One Part Urethane, Black, 10.1 Fl. Oz (Pack of 1) **Brand:** masterseal **Price:** R911 **Availability:** ✅ In Stock ## Summary > 🖤 Seal smart, seal strong — the pro’s choice for lasting protection! ## Quick Answers - **What is this?** 1025568 NP-1 Sealant One Part Urethane, Black, 10.1 Fl. Oz (Pack of 1) by masterseal - **How much does it cost?** R911 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/16675567-1025568-np-1-sealant-one-part-urethane-black-10-1) ## 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 - • **Easy Cleanup & Use:** Smooth application with mineral spirits cleanup—professional results without the hassle. - • **UL Safety Certified:** Meets rigorous UL standards for safety and performance, giving you peace of mind on every project. - • **Weatherproof Confidence:** Water-resistant formula stands up to moisture and outdoor conditions, ideal for roofing and window seals. - • **Durable Black Polyurethane:** Advanced one-part urethane ensures a flexible, rubbery finish that adheres to multiple surfaces including alloy steel. - • **Precision Application, Zero Waste:** Compact 10.1 fl. oz size fits perfectly for targeted sealing jobs without excess. ## Overview MasterSeal 1025568 NP-1 is a black, one-part polyurethane sealant in a convenient 10.1 fl. oz tube, designed for durable, water-resistant sealing on roofing, windows, and alloy steel surfaces. UL certified and easy to apply, it delivers a flexible, rubbery finish that withstands weather and wear, making it a trusted solution for professional-grade sealing needs. ## Description Product Description Masterseal 1025568 NP-1 Sealant One Part Urethane, Black, 10.1 Fl. Oz (Pack of 1) From the Manufacturer Masterseal 1025568 NP-1 Sealant One Part Urethane, Black, 10.1 Fl. Oz (Pack of 1) Review: I am happy with the sealant - I am happy with the sealant. It dries to a rubbery fell and adheres well to all my roofing materials. Only time will tell if it holds up well. I cleaned up with mineral spirits which worked well. Review: Seems like a good product - Exactly suitable for my application. ## Features - Package Dimensions: 30.48 L x 5.08 H x 5.08 W (inches) - Package Weight : 0.95 pounds - Country of Origin : China ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00F54LRIA | | Best Sellers Rank | #56,675 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #60 in Industrial Thread Sealants | | Brand | MasterSeal | | Brand Name | MasterSeal | | Color | Black | | Compatible Material | Alloy Steel | | Customer Reviews | 4.3 out of 5 stars 38 Reviews | | Global Trade Identification Number | 00080492301908 | | Included Components | Masterseal 1025568 NP-1 Sealant One Part Urethane, Black, 10.1 Fl. Oz (Pack of 1) | | Item Dimensions | 2 x 2 x 12.25 inches | | Item Form | Liquid | | Item Type Name | Masterseal 1025568 NP-1 Sealant One Part Urethane, Black, 10.1 Fl. Oz (Pack of 1) | | Item Weight | 0.01 Pounds | | Item dimensions L x W x H | 2 x 2 x 12.25 inches | | Manufacturer | Masterseal | | Material | Polyurethane | | Material Type | Polyurethane | | Model | 1025568 | | Number of Items | 1 | | Part Number | NP1BLK | | Style | Compact | | Style Name | Compact | | Supported Standards | UL standards for safety and performance | | Surface Recommendation | Window | | UPC | 080492301908 | | Unit Count | 10.1 Fluid Ounces | | Warranty Description | Warranty | | Water Resistance Level | Water Resistant | ## Product Details - **Material:** Polyurethane - **Brand:** Masterseal - **Item Weight:** 0.01 Pounds - **Item dimensions L x W x H:** 2 x 2 x 12.25 inches - **Compatible Material:** Alloy Steel ## Images ![1025568 NP-1 Sealant One Part Urethane, Black, 10.1 Fl. Oz (Pack of 1) - Image 1](https://m.media-amazon.com/images/I/712Y7hMb9ML.jpg) ## Questions & Answers **Q: Can I use this to seal the gaps between solid hard wood floor? How is it compared to silicone caulk?** A: This is really meant for exterior use in commercial or industrial applications, or residential for something you never want to deal with again. Once it dries and cures it becomes insanely hard and difficult to remove. Definitely would not recommend this for any interior applications. **Q: what's the highest temperature this can withstand under normal use? can it be used in an automobile engine bay?** A: I’d say no **Q: How old is this product as I understand the shelf life is only 1 year?** A: In the past I have had tubes of this product that were 5 years old, opened and used it like new. Product retains workability for a long time and is better than silicone products for roofing issues. **Q: is this a paintable sealant?** A: No. ## Customer Reviews ### ⭐⭐⭐⭐⭐ I am happy with the sealant *by C***H on September 28, 2016* I am happy with the sealant. It dries to a rubbery fell and adheres well to all my roofing materials. Only time will tell if it holds up well. I cleaned up with mineral spirits which worked well. ### ⭐⭐⭐⭐⭐ Seems like a good product *by P***3 on October 31, 2018* Exactly suitable for my application. ### ⭐⭐⭐⭐⭐ Wear gloves and make sure to not get it on an area you don't want it! *by M***N on October 18, 2020* Used this product for years never had an issue when installed correctly. Stays flexible forever great for areas where areas have expansion or some movement. ## Frequently Bought Together - Masterseal 1025568 NP-1 Sealant One Part Urethane, Black, 10.1 Fl. Oz (Pack of 1) - Primesource NP1 PolySeal Black 10oz Multi-Purpose Polyurethane Caulk 12 Count Water Resistant - BASF Sealant NP1 Polyurethane White 10.1 Oz - Case of 30 --- ## 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.co.za/products/16675567-1025568-np-1-sealant-one-part-urethane-black-10-1](https://www.desertcart.co.za/products/16675567-1025568-np-1-sealant-one-part-urethane-black-10-1) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-08-10*