---
product_id: 311333893
title: "Dowsil - 791 Silicone Sealant Black 310ml"
brand: "dowsil"
price: "$122.70"
currency: USD
in_stock: true
reviews_count: 5
category: "Dowsil"
url: https://www.desertcart.ec/products/311333893-dowsil-791-silicone-sealant-black-310ml
store_origin: EC
region: Ecuador
---

# 20-30 min working time Fast cure, tack free in 2 hrs Superior weather & temp resistance Dowsil - 791 Silicone Sealant Black 310ml

**Brand:** dowsil
**Price:** $122.70
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal smart, seal fast — stay leak-proof and ahead of the pack!

## Quick Answers

- **What is this?** Dowsil - 791 Silicone Sealant Black 310ml by dowsil
- **How much does it cost?** $122.70 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/311333893-dowsil-791-silicone-sealant-black-310ml)

## 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

- • **Fast & Flexible:** Tack free in just 2 hours with flexible silicone that resists tearing and cracking.
- • **Race Against Time:** Generous 20-30 minutes working time lets you perfect every seal without rush.
- • **Seal with Confidence:** Unmatched adhesion on porous & non-porous surfaces for durable, watertight bonds.
- • **Weatherproof Warrior:** Engineered to withstand extreme temperatures and harsh weather conditions effortlessly.
- • **ISO Certified Quality:** Meets ISO 11600-25lm & ISO 9047 Class 50 standards for professional-grade reliability.

## Overview

Dow Corning 791 Black Silicone Sealant is a premium one-part external weatherproofing sealant offering excellent adhesion without priming. It cures quickly, is water resistant, and meets rigorous ISO standards, making it ideal for professional-grade sealing on roofs, boats, and construction substrates.

## Description

Dow corning 791 external weatherproofing sealant is an external weatherproofing neutral silicone sealant. It is a one part sealant that gives excellent un-primed adhesion to both porous and non-porous construction substrates.

Review: Would recommend - Strong bond very strong not watery like other reviews said perfect for letting me watertight seal boats and bait boats flex able but no tare
Review: Almost expired sealant! - Not happy that I was delivered a sealant that is two weeks away from it's expiry date!

## 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 | #60,981 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #142 in Silicone Sealers #340 in Hardware Sealers |
| Brand | DOWSIL |
| Brand Name | DOWSIL |
| Color | Black |
| Compatible Material | Rubber |
| Customer Reviews | 4.3 out of 5 stars 337 Reviews |
| Global Trade Identification Number | 05413278323354 |
| Included Components | 1 x tube of Dow Corning 791 in Black. |
| Item Dimensions | 50 x 50 x 235 millimeters |
| Item Form | Liquid |
| Item Type Name | External Weatherproofing Sealant |
| Item Weight | 0.37 Kilograms |
| Item dimensions L x W x H | 50 x 50 x 235 millimeters |
| Item weight | 0.37 Kilograms |
| Manufacturer | Dow Corning |
| Material | Silicone |
| Material Type | Silicone |
| Model | 4024907/C05 |
| Number of Items | 1 |
| Part Number | 4024907/C05 |
| Style | Compact |
| Style Name | Compact |
| Supported Standards | ISO 11600-25lm, ISO 9047 Class 50 |
| Surface Recommendation | Roof |
| Warranty Description | No guarentee. |
| Water Resistance Level | Water Resistant |
| Water resistance level | Water Resistant |

## Product Details

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

## Images

![Dowsil - 791 Silicone Sealant Black 310ml - Image 1](https://m.media-amazon.com/images/I/61JyOwnIiHL.jpg)
![Dowsil - 791 Silicone Sealant Black 310ml - Image 2](https://m.media-amazon.com/images/I/41ktMlfbszL.jpg)
![Dowsil - 791 Silicone Sealant Black 310ml - Image 3](https://m.media-amazon.com/images/I/31t4wDdxOKL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Would recommend
*by E***S on 4 June 2026*

Strong bond very strong not watery like other reviews said perfect for letting me watertight seal boats and bait boats flex able but no tare

### ⭐ Almost expired sealant!
*by P***T on 23 July 2022*

Not happy that I was delivered a sealant that is two weeks away from it's expiry date!

### ⭐⭐⭐⭐⭐ Quality sealant - A1
*by R***. on 13 November 2023*

I bought this for a seal i needed around a black wooden outdoor unit, where I had some gaps from a pipe I had going through it. It sealed easily and was black to match the unit etc. Went off fairly fast and has remained ever since doing its job - Sealing. Cheap, easy to use and very effective. A1 Product

## 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.ec/products/311333893-dowsil-791-silicone-sealant-black-310ml](https://www.desertcart.ec/products/311333893-dowsil-791-silicone-sealant-black-310ml)

---

*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-07-09*