---
product_id: 51559277
title: "791 Sealant Black 310ml | Resists UV exposure, ozone, moisture and temperature extremes for long-term durability."
brand: "dowsil"
price: "18854CFA"
currency: XOF
in_stock: true
category: "Dowsil"
url: https://www.desertcart.sn/products/51559277-791-sealant-black-310ml-resists-uv-exposure-ozone-moisture-temperature
store_origin: SN
region: Senegal
---

# Fast curing in just 2 hours UV & ozone resistant for lasting durability Withstands extreme temperatures 791 Sealant Black 310ml | Resists UV exposure, ozone, moisture and temperature extremes for long-term durability.

**Brand:** dowsil
**Price:** 18854CFA
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal the deal with Dowsil 791 – where durability meets speed!

## Quick Answers

- **What is this?** 791 Sealant Black 310ml | Resists UV exposure, ozone, moisture and temperature extremes for long-term durability. by dowsil
- **How much does it cost?** 18854CFA 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/51559277-791-sealant-black-310ml-resists-uv-exposure-ozone-moisture-temperature)

## Best For

- dowsil enthusiasts

## Why This Product

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

## Key Features

- • **Rapid Ready:** Tack-free in 2 hours, so your projects move faster with no downtime.
- • **Sleek & Compact:** 310ml tube designed for easy handling and precise application on roofs and rubber surfaces.
- • **Certified Confidence:** Meets ISO 11600-25lm and ISO 9047 Class 50 standards for professional-grade reliability.
- • **Weatherproof Warrior:** Engineered to resist UV, ozone, moisture, and temperature extremes for unmatched longevity.
- • **Precision Working Window:** Offers a 20-30 minute working time to perfect your application without rush.

## Overview

Dowsil 791 Sealant Black 310ml is a premium silicone-based external weatherproofing sealant from Dow Corning, designed to resist UV, ozone, moisture, and extreme temperatures. It offers a 20-30 minute working time and cures tack-free in 2 hours, meeting rigorous ISO standards for professional use, making it ideal for roofing and rubber material applications.

## Description

Free delivery and returns on all eligible orders. Shop Dowsil 791 Sealant Black 310ml | Resists UV exposure, ozone, moisture and temperature extremes for long-term durability..

## Features

- Excellent weathering characteristics
- Resistance to radiation and temperature extremes
- 20-30 minutes working time
- Fast cure - tack free in 2 hours
- Confirms to ISO 11600-25lm and meets ISO specification 9047 Class 50

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0063PXFE4 |
| Best Sellers Rank | 15,915 in DIY & Tools ( See Top 100 in DIY & Tools ) 342 in Sealers |
| Brand | Dowsil |
| Colour | Black |
| Compatible Material | Rubber |
| Country Of Origin | United Kingdom |
| Customer Reviews | 4.3 4.3 out of 5 stars (349) |
| Global Trade Identification Number | 05413278323354 |
| Included Components | 1 x tube of Dow Corning 791 in Black. |
| Item Dimensions | 50 x 50 x 235 millimetres |
| Item Form | Liquid |
| Item Type Name | External Weatherproofing Sealant |
| Item Weight | 0.37 Kilograms |
| Manufacturer | Dow Corning |
| Manufacturer Part Number | 4024907/C05 |
| Material | Silicone |
| Model Number | 4024907/C05 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Product Warranty | No guarentee |
| Style Name | Compact |
| Supported Standards | ISO 11600, ISO 9047 |
| Surface Recommendation | Roof |
| Unit Count | 310.0 millilitre |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** Dowsil
- **Item dimensions L x W x H:** 50 x 50 x 235 millimetres
- **Item weight:** 0.37 Kilograms
- **Material:** Silicone
- **Style:** Compact

## Images

![791 Sealant Black 310ml | Resists UV exposure, ozone, moisture and temperature extremes for long-term durability. - Image 1](https://m.media-amazon.com/images/I/61VglPdYFOL.jpg)

## Available Options

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

## Questions & Answers

**Q: I need to seal around an inset kitchen sink. Tried wickes clear and it goes white when wet. Will this do the job for me?**
A: Yes... good stuff for that or Sunday poly is also very good... different colours. . White is the most popular.

**Q: Does it stick glass**
A: I used this product to craete a seal round an outdoor 1 metre square manhole 'drain cover' over a year ago and  it has not 'degraded' at all since it was applied.  I might be wrong, but I would be fairly confident that it would stick glass pretty well. Care would be needed to avoid 'smearing' the glass tho' as it is very 'smeary and sticky Black rubbery stuff'.  Good Luck.

**Q: Would this stick a rubber seal to a runner for bifold doors?**
A: I’m not sure, I used it to seal around my sink area. I don’t even know if it’s waterproof but it works and is still there a year later .

**Q: Is this okay to use with leds?**
A: Hi, it shouldn't be a problem to use with leds.

## Frequently Bought Together

- Dowsil 791 Sealant Black 310ml
- 791 Silicone Sealant Grey 310ml
- Dowsil 785N Silicone Sealant, White 310ml

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**Shop now:** [https://www.desertcart.sn/products/51559277-791-sealant-black-310ml-resists-uv-exposure-ozone-moisture-temperature](https://www.desertcart.sn/products/51559277-791-sealant-black-310ml-resists-uv-exposure-ozone-moisture-temperature)

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-08-20*