--- product_id: 51559277 title: "Dowsil 791 Sealant Black 310ml" brand: "dowsil" price: "₹ 3161" currency: INR in_stock: true reviews_count: 9 category: "Dowsil" url: https://www.desertcart.in/products/51559277-dowsil-791-sealant-black-310ml store_origin: IN region: India --- # 20-30 min working time UV & weather resistant Resists extreme temperatures Dowsil 791 Sealant Black 310ml **Brand:** dowsil **Price:** ₹ 3161 **Availability:** ✅ In Stock ## Summary > 🛠️ Seal the deal with confidence—weatherproof your world in style! ## Quick Answers - **What is this?** Dowsil 791 Sealant Black 310ml by dowsil - **How much does it cost?** ₹ 3161 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.in](https://www.desertcart.in/products/51559277-dowsil-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 - • **Quick Tack-Free Cure:** Achieves a durable, tack-free finish in just 2 hours—get back to your day faster. - • **Seamless Black Finish:** Perfectly matches black surfaces for a discreet, sleek seal that blends in flawlessly. - • **ISO-Certified Reliability:** Meets ISO 11600-25lm and ISO 9047 Class 50 standards for professional-grade performance. - • **Built to Brave the Elements:** Exceptional resistance to UV radiation and temperature extremes keeps seals intact year-round. - • **Fast & Flexible Application:** Smooth 20-30 minute working window for precise sealing without rush. ## Overview 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. ## Description From the manufacturer Dowsil 791 Sealant Black A one-part, medium-modulus, elastomeric sealant designed for general weathersealing. It is a silicone formulation that cures to a flexible and curable silicone rubber building joint seal. Benefits Ease of application – ready to use as supplied Excellent rheology, low string upon gunning Excellent weatherability, virtually unaffected by sunlight, rain, snow, ozone Neutral cure Low odor Review: 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. Review: Not curing after 2 months bought 2 tubes black and still runny - I was bought for sealing a grave stone to keep water out was not sure when applying it how good it was going to be. Tried it at home and not curing after nearly 2 months a load of rubbish bought 2 tubes a waste of money unless there was some thing wrong with this batch. Will not buy again. ## 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 | 49,250 in DIY & Tools ( See Top 100 in DIY & Tools ) 735 in Sealers | | Brand | Dowsil | | Colour | Black | | Compatible Material | Rubber | | Country Of Origin | United Kingdom | | 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 | | Item dimensions L x W x H | 50 x 50 x 235 millimetres | | 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 | Compact | | Style Name | Compact | | Supported Standards | ISO 11600, ISO 9047 | | Surface Recommendation | Roof | | Unit Count | 310.0 millilitre | | 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 millimetres - **Item weight:** 0.37 Kilograms - **Material:** Silicone - **Style:** Compact ## Images ![Dowsil 791 Sealant Black 310ml - Image 1](https://m.media-amazon.com/images/I/61JyOwnIiHL.jpg) ![Dowsil 791 Sealant Black 310ml - Image 2](https://m.media-amazon.com/images/I/41ktMlfbszL.jpg) ![Dowsil 791 Sealant Black 310ml - Image 3](https://m.media-amazon.com/images/I/31t4wDdxOKL.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 ### ⭐ Very thin and runny and takes hours or days to set *by M***L on 6 March 2026* 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. ### ⭐ Not curing after 2 months bought 2 tubes black and still runny *by J***S on 4 December 2023* I was bought for sealing a grave stone to keep water out was not sure when applying it how good it was going to be. Tried it at home and not curing after nearly 2 months a load of rubbish bought 2 tubes a waste of money unless there was some thing wrong with this batch. Will not buy again. ### ⭐ Terrible no quality inspection or seller sells faulty products. *by L***E on 18 September 2020* It was leaking from the bottom not happy at all. How this passed quality inspection is beyond me. If I didn't need this right now I'd have returned it. Though if it leaks more during use it will be returned opened. ## Frequently Bought Together - Dowsil 791 Sealant Black 310ml - 791 Silicone Sealant Grey 310ml - Dowsil 785N Silicone Sealant, White 310ml --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.in/products/51559277-dowsil-791-sealant-black-310ml](https://www.desertcart.in/products/51559277-dowsil-791-sealant-black-310ml) --- *Product available on Desertcart India* *Store origin: IN* *Last updated: 2026-06-04*