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🖤 Seal it, shield it, forget it — 10 years of roof confidence!
Ronseal Thompsons High Performance Roof Seal Black 4L is a premium, flexible roof coating designed to protect and repair various roofing materials. Featuring UV-stable iron oxide pigments and a vapour permeable membrane, it offers 10 years of weatherproofing by preventing cracking, splitting, and moisture damage. Ideal for professional-grade roof maintenance, it comes in a resealable 4-litre tin for convenient application and long-lasting protection.
| ASIN | B001GU6I04 |
| Best Sellers Rank | 27,531 in DIY & Tools ( See Top 100 in DIY & Tools ) 23 in Roof Coatings & Paints 2,630 in Adhesives & Sealers |
| Brand | Ronseal |
| Colour | Black |
| Compatible Material | Roof, potentially other materials such as wood, concrete, metal, and various types of plastics or composite materials |
| Country Of Origin | United Kingdom |
| Customer Reviews | 4.5 4.5 out of 5 stars (268) |
| EU Spare Part Availability Duration | 10 Years |
| Included Components | Mounting Hardware||User Manual |
| Item Dimensions | 18 x 18 x 19 centimetres |
| Item Form | Liquid |
| Item Weight | 4 Kilograms |
| Manufacturer | Ronseal |
| Manufacturer Part Number | RSLHPRSBL4L |
| Material | Iron Oxide |
| Model Number | RSLHPRSBL4L |
| Number of Items | 1 |
| Style Name | Compact |
| Surface Recommendation | Roof |
| Unit Count | 1.0 count |
| Water Resistance Level | Waterproof |
A**R
Excellent item
Does a great job. Would recommend.
D**T
Lasts and protects well
Used Thomson’s over the years exellent protection easy to apply use it renew protection on flat felt roofs good priced good coverage
B**Y
Works well and is easy to apply
Very good shed roof paint. Easy to apply -- with a suitable brush and does a good job of water proofing the shed room
B**S
Great for repairing felt roofs and sealing.
This is incredibly useful sealant and coating or repairing felt roofs or for extending the life of the roof. Have used it for sticking down torn roofing felt to sealing porous old felt to covering clout nail heads which were letting water in. Not cheap but well worth it.
L**Z
Like water off a ducks back
Wow . One coat so far and the water drips right off . It goes a long way . Very impressed on ease of application and durability.
Y**M
Amazing product
I had tried other products without success but this high performance roof seal is brilliant. My felt roof had some serious cracks. 1 coat of this in the cracks, then mastic to fill them. Then a final coat over the whole roof 20' x 7'. The result looks fantastic and should last a few more years.;
P**G
a new roof for years to come
This stuff is brilliant! I built a very large shed several years ago and used good quality roof felt but a few cracks were appearing at the roof folds. I The roof is approximately 14 square metres and this tin covered it perfectly. I could not believe how well it filled the cracks and provided a new skin. It also looks fantastic.
K**R
Does what it says
Sealed shed roof and despite torrential rain storms since applied has worked flawlessly. Easy to apply with good coverage and adhesion despite being on sloped shed roof. Not the cheapest but the surface finish and results worth the cost.
Trustpilot
2 weeks ago
2 weeks ago