Thompsons High Performance Roof Seal Black 2.5Ltr Product Code: 46708

Highly flexible black coating that outperforms bitumen-based products. Resists cracking during expansion and contraction. Rainproof in 6 hours. No primer required. Will last up to 10 years.


  • 2 Applications Required
  • Suitable for Roofing
  • Long Lasting
  • Model No: 30144X
  • Low Odour
  • UV & Weather-Resistant


Curing time: Dries in 6 Hours. Coverage: 2 sqm per litre.
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Safety Data Sheet
Additional Information
Technical Specification
  • Resistant Type : UV & Weather-Resistant
  • Brand : Thompsons
  • Product Type : High Performance Roof Seal
  • Suitable Application : Suitable for Roofing
  • Volume : 2.5 Ltr
  • Total Product Weight : 3840 kg
  • Model No : 30144X
  • Coating & Finishes Drying Time : Dries in 6 Hours
  • Colour : Black
  • Pack Size : 1
  • Manufacturer Guarantee : 10 Year Manufacturer's Guarantee (T&Cs Apply)
  • Pieces in Pack/Case : 1
Product Contents
Delivery & Returns


Standard delivery service up to 3 working days: €8.95

Free delivery on all orders over €70.00

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Hopefully you won't need to return an item, however, if you do, it is our aim to make this as simple as possible. By following the guidance below you can help us to help you when a product is not what you expected, or is faulty. Your statutory rights are not affected by this guidance.


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€23.45 Incl. 23% VAT

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Thompsons High Performance Roof Seal Black 2.5Ltr is rated 4.3 out of 5 by 56.
Rated 5 out of 5 by from Good roof sealant Easy to use...can paint or roll on..I used it on my flat roof that had a doesn't have one now...good price,especially the 4ltr tin...I've done my felted shed roof as well...two coats and it's cheaper than re felting a garage roof..
Date published: 2017-10-26
Rated 5 out of 5 by from Just the job Works great, sealed the leaks easily on flat roof just painted it on.
Date published: 2017-10-24
Rated 1 out of 5 by from WASTE OF MONEY FOR FLAT ROOFS My dad has sworn on this stuff for so long I thought I'd give my garage roof a few coats to make it last. Bearing in mind that it's a flat roof which is around 5-10 years old, the felt is starting to crack in places. Nice dry day came and I wacked a coat on. All ok and really happy with it up to inspecting it a few days after it had rained. Most older flat roofs collect standing water, that's why flat roofs are so notorious. Where this pool of water had collected, the paint had gone back to a grey colour and had started to create tiny pockets underneath the paint! This just rubbed off with the back of my hand easily. Being perplexed I rang the help line to which I was told that it had done that because I'd only put one coat on and that this product isnt best used for flat roofs with standing water! I was told to "build it up" with thinned paint and re coat with full strength product. As I understand although I'm not a painter, paint is microns thick if applied right so trying to level off a 1 metre sq 5mm deep concaved bit is going to take some filling. So tonight I have pressure washed it all off the roof which was a total waste of time and money. I have since bought some isoflex which looks to be a better longer lasting solution (which I'll review when done) So in essence this product is ok for maintaining flat roofs (what it says on the front of the tin) but only if there's no standing water and its brand new. Pretty disappointed
Date published: 2017-08-10
Rated 5 out of 5 by from Thompsons Roof Seal Thompsons High Performance Roof Seal Black 2.5Ltr (46708). This paint is great, dries a matt black looks good, easy to put on, I even purchased another tin to paint a 8ft x 4ft sterling board and made a climbing wall for my kids (climbing studs purchased elsewhere), thats been up months now in all weather, kids love it and still looks new. Great product.
Date published: 2017-08-10
Rated 5 out of 5 by from Flat roof repair We used this for a small temp repair and it worked a treat, until we were able to re-felt roof with non-rip felts. very good.
Date published: 2017-06-08
Rated 5 out of 5 by from Roof sealer This is a great sealer for any type of flat roof , easy to apply and dries quite quickly . At at very reasonable price , well recommended.
Date published: 2016-12-12
Rated 5 out of 5 by from So easy to use. This roof seal is so easy to brush on and brushes wash out in water. I certainly waterproofed the old felt on my shed roof.
Date published: 2016-10-03
Rated 5 out of 5 by from It really works, Tried a few different products over the years but this one works, give it a nice heavy coat, it dries really quick and does the job. This is the third time I have used it and no complaints. will use it again.
Date published: 2016-07-20
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