---
product_id: 51559277
title: "791 Sealant Black 310ml"
brand: "dowsil"
price: "B/.63"
currency: PAB
in_stock: true
reviews_count: 10
category: "Dowsil"
url: https://www.desertcart.com.pa/products/51559277-791-sealant-black-310ml
store_origin: PA
region: Panama
---

# 20-30 min working time Fast cure, tack-free in 2 hrs Withstands extreme temps 791 Sealant Black 310ml

**Brand:** dowsil
**Price:** B/.63
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal it like a pro—fast, flawless, and built to last!

## Quick Answers

- **What is this?** 791 Sealant Black 310ml by dowsil
- **How much does it cost?** B/.63 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/products/51559277-791-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

- • **Sleek Black Finish:** Seamlessly blends with dark surfaces for a discreet, polished look that complements modern aesthetics.
- • **Weatherproof Warrior:** Superior resistance to UV radiation and harsh weather keeps your seals intact season after season.
- • **Rapid Seal Technology:** Achieve a tack-free, durable finish in just 2 hours—get back to your day faster.
- • **Precision Working Window:** Generous 20-30 minute working time lets you perfect every application without rush.
- • **ISO Certified Reliability:** Meets ISO 11600-25lm and ISO 9047 Class 50 standards for trusted professional-grade performance.

## Overview

Dowsil 791 Sealant Black 310ml is a premium silicone sealant engineered for outdoor durability. It offers excellent weathering resistance, withstands radiation and temperature extremes, and cures quickly to a tack-free finish within 2 hours. Certified to ISO standards, it provides a reliable, professional-grade seal with a sleek black finish ideal for matching dark surfaces.

## Description

Shop Dowsil 791 Sealant Black 310ml. Free delivery on eligible orders of £20 or more.

Review: Great - This is great stuff I've never heard or seen this product before i needed something for outside and the internet recommended this. I have a black outdoor junction box that was leaking in the seal originally used was coming away from the wall ideally needed to replace the box but i have that weird pebbledash insulation stuff so a nightmare to screw into hence why i got this product to seal the back of the box onto the wall and a coat around the front cap to seal it from water.
Review: Quality sealant - A1 - 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

## 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 |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 29,437 in DIY & Tools ( See Top 100 in DIY & Tools ) 467 in Sealers |
| Colour | Black |
| Customer Reviews | 4.2 4.2 out of 5 stars (347) |
| Date First Available | 28 Aug. 2014 |
| Included Components | 1 x tube of Dow Corning 791 in Black. |
| Item Package Quantity | 1 |
| Item Weight | 370 g |
| Item model number | 4024907/C05 |
| Manufacturer | Dow Corning |
| Material | Silicone |
| Measurement System | Metric |
| Number of Pieces | 1 |
| Part Number | 4024907/C05 |
| Product Dimensions | 5 x 5 x 23.5 cm; 370 g |
| Size | Size 310 |
| Style | Compact |

## 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 - Image 1](https://m.media-amazon.com/images/I/61JyOwnIiHL.jpg)

## 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great
*by D***Y on 29 July 2025*

This is great stuff I've never heard or seen this product before i needed something for outside and the internet recommended this. I have a black outdoor junction box that was leaking in the seal originally used was coming away from the wall ideally needed to replace the box but i have that weird pebbledash insulation stuff so a nightmare to screw into hence why i got this product to seal the back of the box onto the wall and a coat around the front cap to seal it from water.

### ⭐⭐⭐⭐⭐ 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

### ⭐⭐⭐⭐ Black, easy to apply, can be messy
*by B***R on 21 May 2020*

The price is good and delivery was quick. The sealant tube is as easy to use as any other sealant tube (though you'll need to provide your own nozzle). Adhesion is good but not great, so you can get some stray blobs, and with the black dye those blobs can soon make your clothes a mess... be careful out there!

## 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.com.pa/products/51559277-791-sealant-black-310ml](https://www.desertcart.com.pa/products/51559277-791-sealant-black-310ml)

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*Product available on Desertcart Panama*
*Store origin: PA*
*Last updated: 2026-01-30*