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Thompsons Black Roof sealant, 4L
Product details
Product information
Product information
You can apply this roof sealant from the Thompson's High performance range to exterior surfaces with a brush, roller or broom. It's suitable for maintaining flat roofs and will cover 2 m² per litre on average.
- Don't allow to freeze
- Read the safety data sheet for further information
- Instructions for use: On cold, damp days drying and re-coat times will take longer, so for best results, use on a dry day above 10C. Give the tin a really good stir before & during use. You can apply this using a brush, roller or soft broom whichever you prefer. Apply in long, smooth strokes over the area of repair. Wait 6 hours before putting on a second coat.
Features and benefits
- Flexes with the natural movement of the roof
- Resists the sun's UV rays, so colour won't fade
- Rainproof in 6 hours
- Outperforms standard bitumen paint
- On cold, damp days drying and re-coat times will take longer, so for best results, use on a dry day above 10C. Give the tin a really good stir before & during use. You can apply this using a brush, roller or soft broom whichever you prefer. Apply in long, smooth strokes over the area of repair. Wait 6 hours before putting on a second coat
Legal information
- Contains 1,2-benzisothiazol-3(2H)-one and reaction mass of 5-chloro-2-methyl-2Hisothiazol-3-one and 2-methyl-2H-isothiazol-3-one (3:1). May produce an allergic reaction.
Health and safety
Please note that this item has additional safety or regulatory datasheets available. The product may have possible health and safety hazards covered in these documents. Refer to the container for full information and always follow the instructions.
DetailsSpecifications
| Brand | Thompsons |
|---|---|
| Application conditions | Dry |
| Colour | Black |
| Container type | Tin |
| Coverage | 8m² |
| Drying time | 2 h |
| Location | Exterior |
| Minimum touch dry time | 2h |
| Pack quantity | 1 |
| Paintable | Not paintable |
| Weight (g) | 6300g |
| Setting time | 360min |
| Solvent-free | Solvented |
| Substance | Polymer |
| VOC emissions class in indoor air | No VOC level recorded |
| VOC level | Low |
| Volume | 4000ml |
| Product code | 5010214801466 |
Safety Information
Read carefully and follow all instructions. Keep out of reach of children. If medicaladvice is needed, have product container or label at hand. Contains a biocidal product.Contains 1,2-benzisothiazol-3(2H)-one and reaction mass of 5-chloro-2-methyl-2H-isothiazol-3-one and 2-methyl-2H-isothiazol-3-one (3:1). May produce an allergicreaction.
Manufacturer / EU responsible person
EU responsible person
Sherwin-Williams (Ireland) Ltd
Address
Unit 53
Robinhood Industrial Estate
Dublin 22
Dublin
D22PW99
Ireland
Contact
Reviews
4.5 / 5(12 reviews)Dbm1 - 5 / 5 - 20/03/2026
Good
This product seems to too do the job you need to bring back the discount for pensioners
Chimps - 5 / 5 - 02/11/2025
Very thick and you can see how smooth it gos on
I got this about 2 months ago as my shead roof was leaking after applying it now fine and dry made up
tangosierra - 5 / 5 - 08/06/2022
Brilliant
I built a lean too, to to house my garden furniture during the winter! This went on brilliantly and so easy, a lot better than hiring a blow torch and felt on the roof! Definitely use this again!!
Kev 2811 - 5 / 5 - 08/06/2022
Easy to apply
The good thing about this product is the fact it is liquid enough to be a applied with a roller, it also provides a very good seal.
dssmex - 4 / 5 - 22/06/2014
very good
bought this to seal a concrete slab garage roof easy to apply with a brush, coverage only about half that stated but this probably to rough surface i applied it to dried very quickly had heavy rain 2 days later and no leaks seen will have to see if it manages its 10yr life span
0ne2ask - 5 / 5 - 12/02/2014
Stops porous roof
I used this product on my daughters "conservatory" roof which is not glazed and was leaking in heavy rain round the flashing and joints in the roofing felt. A treatment with two coats of the vulnerable areas has stopped the ingress and this weather is really testing the repair. Not sure of how long it will last but a first class emergency repair giving time to look at a permenant repair
revenger909 - 5 / 5 - 14/06/2013
Garage seal
Brill product. It was a sunny day and it was drying as I was putting it on the garage roof. Needed two tins. I thought it would only be one. In future I will buy two and then take back the second if not required. Could have saved myself some time. Easy to spread with a roller.
RYGM - 1 / 5 - 29/03/2012
waste of time and money
bought one tin and applied as per instruction,,, two days after application, the rubber-like substance started having cracks. thinking that what I've initially applied is not thick enough, got another tin at the store and applied it too, lo and behold cracks started appearing after two days!!! spent so much time in preparing and cleaning the flat roof and spent nearly £50 which all came useless!!!
facebook - 5 / 5 - 16/03/2012
awesome
So easy to apply, large brush and some disposable gloves. Tried all sort of products over the years and this has so far got to be the best, applied 2 coats 12 months ago and still looks like New and if you've got any leftover just put the lid back on and stick it in the shed, it does not cure up / get hard /go off in the tin as its water based......... 5 stars from me.
Straker - 5 / 5 - 27/01/2012
Excellent product!
Found this product in my local B&Q (Barrow-in-Furness) a couple of years back and was hugely impressed. Not only is it easy to apply, (the one I used before was a nightmare, it solidified whilst you were using it! NOT a Thompson's product I hasten to add!) but was very reasonable in price too! The big plus point though is it's durability! My roof is totally waterproof now, after years of damp patches appearing in the bedrooms and then ladders going up and down....good job I don't mind heights! I have moved house now and am going to do the flat garage roof with Thompson's when the weather improves (if ever?...haha)