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🛠️ Seal the deal with confidence—weatherproof your world in style!
Dowsil 791 Sealant Black 310ml is a premium silicone-based external weatherproofing sealant designed for durable, flexible sealing on rubber and other surfaces. It offers excellent resistance to UV radiation and temperature extremes, cures quickly to a tack-free finish within 2 hours, and complies with rigorous ISO standards, making it the go-to choice for professional and DIY outdoor sealing projects.
| ASIN | B0063PXFE4 |
| Best Sellers Rank | 29,207 in DIY & Tools ( See Top 100 in DIY & Tools ) 517 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 |
| 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 |
D**Y
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.
R**.
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
B**R
Black, easy to apply, can be messy
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!
D**K
It seals.
What can one say about a tube of sealant? Does it seal? Yes.
M**L
Very thin and runny and takes hours or days to set
This sealant is very thin and runny and it takes ages, like may hours or days to set. It’s tricky to work compared with typical silicone sealant because you can’t make a nice bead and smooth it with your finger - its just to thin and gets everywhere. I switched to Sikaflex EBT+ and was much happier with the work and result.
K**E
Looks like this will work
Very sticky, need to let it go off to try and clean any off, so far so good
D**L
Hard to use but works well.
Along with most of the 791 range the sealant is very thin, for myself a novice who does sealant work a few times of year this was very difficult to work with, and hard to get a good bead. It does however have a very long working time at the expense of taking a long time to skin and cure. The last joint, only a 5/6mm bead, is still not fully cured after 48 hours. The final finish is good, flexible, but taping any porous or textures surfaces is a must, and being extra careful to not touch it for a few days is essential to a good finish.
M**S
Great product
Probably the best silicone sealant available
P**T
Not happy that I was delivered a sealant that is two weeks away from it's expiry date!
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