---
product_id: 276595710
title: "XFasten Silicone Sealant Waterproof Black Cartridge, 10.1 oz (4-Pack) Black Caulking Silicone Adhesive Sealant Cartridge for RV, General Use, Window, Door, Glass, Automotive Leak Sealing"
brand: "xfasten"
price: "VT20406"
currency: VUV
in_stock: true
reviews_count: 13
category: "X Fasten"
url: https://www.desertcart.vu/products/276595710-xfasten-silicone-sealant-waterproof-black-cartridge-10-1-oz-4
store_origin: VU
region: Vanuatu
---

# Waterproof up to 15 years Heat & UV resistant 350 PSI tensile strength XFasten Silicone Sealant Waterproof Black Cartridge, 10.1 oz (4-Pack) Black Caulking Silicone Adhesive Sealant Cartridge for RV, General Use, Window, Door, Glass, Automotive Leak Sealing

**Brand:** xfasten
**Price:** VT20406
**Availability:** ✅ In Stock

## Summary

> 💼 Seal smart, seal strong — the pro’s choice for lasting leak protection!

## Quick Answers

- **What is this?** XFasten Silicone Sealant Waterproof Black Cartridge, 10.1 oz (4-Pack) Black Caulking Silicone Adhesive Sealant Cartridge for RV, General Use, Window, Door, Glass, Automotive Leak Sealing by xfasten
- **How much does it cost?** VT20406 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/276595710-xfasten-silicone-sealant-waterproof-black-cartridge-10-1-oz-4)

## Best For

- xfasten enthusiasts

## Why This Product

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

## Key Features

- • **Shrink & Crack Proof:** Maintains flexibility and adhesion without cracking or shrinking, even under freezing temps or constant rain.
- • **Fast & Flawless Application:** Jam-resistant nozzle and quick 30-minute set time mean less downtime and faster project completion.
- • **Industrial-Grade Durability:** Engineered to withstand extreme weather, UV rays, and pressure for up to 15 years—your ultimate leak defense.
- • **Versatile Surface Compatibility:** Seals flawlessly on metal, glass, wood, stone, and granite—perfect for windows, doors, RVs, and automotive fixes.
- • **Professional-Grade Sealant Chemistry:** Neutral-cure formula safe for metals and masonry, delivering superior adhesion without corrosion risks.

## Overview

XFasten Silicone Sealant Waterproof Black Cartridge is a professional-grade, industrial silicone sealant designed for indoor and outdoor use. It offers waterproof protection rated up to 15 years, resists UV, heat, and pressure, and cures quickly within 30 minutes. Its neutral-cure formula ensures strong adhesion on multiple surfaces without shrinking or cracking, making it ideal for windows, doors, automotive, and RV leak sealing.

## Description

XFasten Silicone Sealant Waterproof Black Cartridge, 10.1 oz (4-Pack) Black Caulking Silicone Adhesive Sealant Cartridge for RV, General Use, Window, Door, Glass, Automotive Leak Sealing: desertcart.com: Industrial & Scientific

Review: All Positive!!! - I want to address some of the negative comments. Please be aware of what you’re buying, and make sure you understand what you’re talking about before leaving a review. This product is an industrial-grade silicone sealant, meaning it’s designed for professional or specialized use. While it may look similar to the silicones sold at retail stores, its curing chemistry, adhesion strength, and environmental resistance are on a different level. Secondly, any product labeled “marine” or “aquarium” grade is designed with different performance characteristics and curing behaviors. These formulations are typically made to resist long-term water exposure and maintain adhesion in wet or submerged conditions, which sets them apart from general-purpose silicones. Now, regarding the chemistry — this is a neutral-cure silicone. Neutral-cure silicones release alcohols or oximes instead of acetic acid as they cure. Because of that, they tend to be more sensitive to environmental factors during curing, including temperature, humidity, surface contamination (like oils, grease, or dust), and material compatibility. While “more sensitive” is true to an extent, they’re also generally safer for metal and masonry surfaces compared to acetoxy (acid-cure) silicones, which can corrode certain materials. With that in mind, this product offers excellent value and performs exactly as described — if you follow the instructions and surface preparation guidelines carefully. I have no doubt that it can meet or even exceed its 15-year durability rating when properly applied and cured under suitable conditions. Lastly, this is not a glue. It is not marketed or intended to be one. It’s a sealant, designed to create a flexible, watertight, and weather-resistant seal — and it performs that function exactly as it should.
Review: Great product - Great seal ability and durable. Works great as a sealer and an adhesive. Highly recommend this product!

## Features

- INDUSTRIAL-GRADE WEATHERPROOF black silicone sealant that offers maximum protection against water damage, leaks, drips, UV, extreme heat, and pressure for both indoor and outdoor environment on most surfaces like metal, granite, stone, wood and glass.
- RATED TO PROTECT UP TO 15 YEARS. This black silicone sealant adhesive is laboratory tested and rated to provide protection against dark spots, stains and other damage and stains caused by weather, water leaks, drips and heat.
- EASY TO APPLY BLACK SILICONE CAULK CATRIDGE. The XFasten Waterproof Black Silicone Caulk is packed inside a high-pressure resistant cartridge that is equipped with a jam-resistant nozzle for easy and smooth application.
- QUICK SETTING AND CURING. Do you need to quickly fix a leak on your door or shower glass? We got you covered! The XFasten Silicone sealant waterproof cartridge dries, sets and cures in 30 minutes and is ready to be exposed under the scorching heat or heavy rain.
- DOES NOT SHRINK AND CRACK. With excellent adhesion, maximum flexibility and superior sheer stress resistance, our waterproof black silicone caulk will not shrink or crack even if constantly exposed under freezing temperatures, UV from scorching sunlight, or constant rain water drips.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08B5YMQCN |
| Best Sellers Rank | #7,328 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #21 in Silicone Caulk #56 in Industrial Sealants #3,273 in Hardware |
| Brand | XFasten |
| Color | Black |
| Date First Available | June 15, 2020 |
| Full Cure Time | 3E+1 Minutes |
| Initial Hardening Time | 3E+1 Minutes |
| Item Form | Paste |
| Item Weight | 10.1 ounces |
| Liquid Volume | 10.1 Fluid Ounces |
| Manufacturer | XFasten |
| Material | 100% Black Silicone Sealant |
| Number of Items | 4 |
| Product Dimensions | 2.17 x 7.88 x 9.37 inches |
| Surface Recommendation | Window,Door |
| Tensile Strength | 350 Pounds Per Square Inch |
| Unit Count | 40.4 Ounce |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** XFasten
- **Color:** Black
- **Full Cure Time:** 3E+1 Minutes
- **Item Weight:** 10.1 Ounces
- **Liquid Volume:** 10.1 Fluid Ounces

## Images

![XFasten Silicone Sealant Waterproof Black Cartridge, 10.1 oz (4-Pack) Black Caulking Silicone Adhesive Sealant Cartridge for RV, General Use, Window, Door, Glass, Automotive Leak Sealing - Image 1](https://m.media-amazon.com/images/I/71kcEn45npL.jpg)
![XFasten Silicone Sealant Waterproof Black Cartridge, 10.1 oz (4-Pack) Black Caulking Silicone Adhesive Sealant Cartridge for RV, General Use, Window, Door, Glass, Automotive Leak Sealing - Image 2](https://m.media-amazon.com/images/I/814xZ8YzMaL.jpg)
![XFasten Silicone Sealant Waterproof Black Cartridge, 10.1 oz (4-Pack) Black Caulking Silicone Adhesive Sealant Cartridge for RV, General Use, Window, Door, Glass, Automotive Leak Sealing - Image 3](https://m.media-amazon.com/images/I/71uuQpC6ycL.jpg)
![XFasten Silicone Sealant Waterproof Black Cartridge, 10.1 oz (4-Pack) Black Caulking Silicone Adhesive Sealant Cartridge for RV, General Use, Window, Door, Glass, Automotive Leak Sealing - Image 4](https://m.media-amazon.com/images/I/81LQk+ekNLL.jpg)
![XFasten Silicone Sealant Waterproof Black Cartridge, 10.1 oz (4-Pack) Black Caulking Silicone Adhesive Sealant Cartridge for RV, General Use, Window, Door, Glass, Automotive Leak Sealing - Image 5](https://m.media-amazon.com/images/I/81czt9K6sxL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ All Positive!!!
*by L***N on October 9, 2025*

I want to address some of the negative comments. Please be aware of what you’re buying, and make sure you understand what you’re talking about before leaving a review. This product is an industrial-grade silicone sealant, meaning it’s designed for professional or specialized use. While it may look similar to the silicones sold at retail stores, its curing chemistry, adhesion strength, and environmental resistance are on a different level. Secondly, any product labeled “marine” or “aquarium” grade is designed with different performance characteristics and curing behaviors. These formulations are typically made to resist long-term water exposure and maintain adhesion in wet or submerged conditions, which sets them apart from general-purpose silicones. Now, regarding the chemistry — this is a neutral-cure silicone. Neutral-cure silicones release alcohols or oximes instead of acetic acid as they cure. Because of that, they tend to be more sensitive to environmental factors during curing, including temperature, humidity, surface contamination (like oils, grease, or dust), and material compatibility. While “more sensitive” is true to an extent, they’re also generally safer for metal and masonry surfaces compared to acetoxy (acid-cure) silicones, which can corrode certain materials. With that in mind, this product offers excellent value and performs exactly as described — if you follow the instructions and surface preparation guidelines carefully. I have no doubt that it can meet or even exceed its 15-year durability rating when properly applied and cured under suitable conditions. Lastly, this is not a glue. It is not marketed or intended to be one. It’s a sealant, designed to create a flexible, watertight, and weather-resistant seal — and it performs that function exactly as it should.

### ⭐⭐⭐⭐⭐ Great product
*by A***R on September 13, 2025*

Great seal ability and durable. Works great as a sealer and an adhesive. Highly recommend this product!

### ⭐⭐⭐⭐⭐ excellent stuff, used it to caulk 4 new windows in my house, better than HD!
*by M***M on November 2, 2025*

saved $500 installing the windows myself and this was my choice of caulking. i bought 2 tubes but needed 4, so i ran to home depot and got 2 more. the home depot ones are garbage, when i removed the shims, the windows fell down the next day, where as the amazon caulking was amazing a held the other 2 windows in. hard to believe, but it's true.

## Frequently Bought Together

- XFasten Silicone Sealant Waterproof Black Cartridge, 10.1 oz (4-Pack) Black Caulking Silicone Adhesive Sealant Cartridge for RV, General Use, Window, Door, Glass, Automotive Leak Sealing
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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-03-02*