Product Reviews

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.

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.
Average Customer Rating:
3.857 out of 5
3.9
 out of 
5
(14 Reviews) 14
Open Ratings Snapshot
Rating Snapshot (14 reviews)
5 stars
7
4 stars
4
3 stars
0
2 stars
0
1 star
3
11 of 14(79%)reviewers would recommend this product.
Customer Reviews for Thompson's High Performance Roof Seal 2.5L
Review 1 for Thompson's High Performance Roof Seal 2.5L
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
roof sealant
15 Aug 2014
By keefyboy
, Reading
"this product did the job perfectly, easy to apply to
existing garage roof felt
"
Review 2 for Thompson's High Performance Roof Seal 2.5L
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Thompsons bitumatic roof seal
20 Jun 2014
By Jitt
, Scunthorpe
"A bit disapointed with the coverage, barely 0.5ltr per sq metre of roof. I only wish this had been stated on the write up. But it seems to be an excellent product for repairing a leaky roof, although it has yet to rain really hard. Easy to apply."
Review 3 for Thompson's High Performance Roof Seal 2.5L
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
sealer
24 May 2014
By tomboy
, plymouth
"waiting to use product have used it before and gave rating on that."
0 of 1 people found this review helpful.
Review 4 for Thompson's High Performance Roof Seal 2.5L
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
excellent product
5 May 2014
By sparkymike123
, liverpool
Images for this Review
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User submitted photo
"this roof seal was brilliant. OK i did use it on concrete tiles to seal and change the colour of a tired old roof but WOW its so good!
Coverage was 65 concrete tiles (textured 12x16 inch teracotta coloured) needed 2 tins to complete the job. got covered in the stuff and it washed off so easily. brushes and kettle came up like new
"
1 of 1 people found this review helpful.
Review 5 for Thompson's High Performance Roof Seal 2.5L
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Thompsons HP Roofseel
28 Sep 2013
By strawberrybill
, ILFORD, ESSEX
"I made sure the weather was going to be dry for at least 24 hours before using the product. In my opinion this is very important to ensure it really seels well. I was re-seeling a small flat roof on a window bay that started to leak a few weeks back. The seeler was very easy to apply and I put it on thickly. The temperature was around 15C with a slight breeze and it dried within a couple of hours. By the following morning the seeler had set really hard and looked as thought it didn't need another coat, but I gave it one anyway.
I am confident the roof will remain water proof for years !! A VERY GOOD PRODUCT IN MY OPINION, WHEN APPLIED CORRECTLY !!
"
1 of 1 people found this review helpful.
Review 6 for Thompson's High Performance Roof Seal 2.5L
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Excellent product
7 Aug 2013
By Phillippio
, Hull
"This works as it's supposed to. I have used it on many projects over the last six years or so with excellent results.
Ignore the bad reviews, this is not emergency roof seal that can be applied in the rain, this is for preventative maintenance and as with most roofing products to be applied in good weather. Thompsons manufacture an emergency roof seal so in the case of the bad reviews...buy the right product!
"
2 of 2 people found this review helpful.
Review 7 for Thompson's High Performance Roof Seal 2.5L
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Good Stuff
17 Aug 2009
By BuilderSam
, Scotland
"The poor reviews below are because they are using it incorrectly. READ! and follow the instructions and this stuff is very good. If it was in stock I would be buying more of it Screwfix!"
3 of 3 people found this review helpful.
Review 8 for Thompson's High Performance Roof Seal 2.5L
Overall Rating: 
4 out of 5
4 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Would you recommend this product? Yes
Overall Rating: 
4 out of 5
4 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
fixaleak
13 Aug 2014
By oldgrumps
, Hopton
"I tried this product rather than replace the whole roof covering, applied the seal to all the joints. It rained overnight and the following day, no signs of water penetration therefore can only state that the product does exactly what it states. How long for ?"
Review 9 for Thompson's High Performance Roof Seal 2.5L
Overall Rating: 
4 out of 5
4 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Would you recommend this product? Yes
Overall Rating: 
4 out of 5
4 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Roof sealant
30 Oct 2011
By ryeland
, shrewsbury
"Very easy to apply with good coverage per litre. If you use a roller or wide brush it is a bit messy to get out of the plastic container."
1 of 1 people found this review helpful.
Review 10 for Thompson's High Performance Roof Seal 2.5L
Overall Rating: 
4 out of 5
4 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
4 out of 5
4 out of 5
Would you recommend this product? Yes
Overall Rating: 
4 out of 5
4 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
4 out of 5
4 out of 5
not the same product
16 Jul 2011
By devonboy
, orkney
"i use isoflex for emergency/ winter condtions and thomsons for planned maintance. i have too agree that the instructions are clear. This is a great product that if applied correctly works everytime"
Review 11 for Thompson's High Performance Roof Seal 2.5L
Overall Rating: 
4 out of 5
4 out of 5
Value: 
3 out of 5
3 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Would you recommend this product? Yes
Overall Rating: 
4 out of 5
4 out of 5
Value: 
3 out of 5
3 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Read the Product Description
9 Jul 2011
By Anonymous
, Oxford
"I use this product to MAINTAIN a flat roof. Thats the key word, this isnt an emergency repair product it's a paint that you use for maintenance. If you need a product for repairs, read the descriptions carefully."
0 of 1 people found this review helpful.
Review 12 for Thompson's High Performance Roof Seal 2.5L
Overall Rating: 
1 out of 5
1 out of 5
Value: 
1 out of 5
1 out of 5
Features: 
1 out of 5
1 out of 5
Performance: 
1 out of 5
1 out of 5
Reliability: 
1 out of 5
1 out of 5
Would you recommend this product? No
Overall Rating: 
1 out of 5
1 out of 5
Value: 
1 out of 5
1 out of 5
Features: 
1 out of 5
1 out of 5
Performance: 
1 out of 5
1 out of 5
Reliability: 
1 out of 5
1 out of 5
Doesn't work.
14 Jun 2010
By workerlad
, Hampshire
"I'm afraid I agree with the bad reviews. Bought to repair some flat roof cracks in the felt. Filled with Weathermate first. BUT after you apply the Thomson, you probably need to wait about 1-2 days for it to cure properly. It's true I had a downpour about 7 hours after application but it just washed it off. I'm going back to Isoflex personally - harder to use but for a good reason! It stays on!"
0 of 2 people found this review helpful.
Review 13 for Thompson's High Performance Roof Seal 2.5L
Overall Rating: 
1 out of 5
1 out of 5
Value: 
3 out of 5
3 out of 5
Features: 
1 out of 5
1 out of 5
Performance: 
1 out of 5
1 out of 5
Reliability: 
1 out of 5
1 out of 5
Would you recommend this product? No
Overall Rating: 
1 out of 5
1 out of 5
Value: 
3 out of 5
3 out of 5
Features: 
1 out of 5
1 out of 5
Performance: 
1 out of 5
1 out of 5
Reliability: 
1 out of 5
1 out of 5
dont bother !!
16 Dec 2008
By magicaltrevor
, pontypridd
"this stuff isnt any good...
Cant use in the wet, must stay dry for 6 hours after using!!! needs 2 coats!!! must be used above 10 degree c !!!
so ideal if you leave the leaking roof till summer to repair!!!"
4 of 5 people found this review helpful.
Review 14 for Thompson's High Performance Roof Seal 2.5L
Overall Rating: 
1 out of 5
1 out of 5
Value: 
3 out of 5
3 out of 5
Features: 
1 out of 5
1 out of 5
Performance: 
3 out of 5
3 out of 5
Reliability: 
1 out of 5
1 out of 5
Would you recommend this product? No
Overall Rating: 
1 out of 5
1 out of 5
Value: 
3 out of 5
3 out of 5
Features: 
1 out of 5
1 out of 5
Performance: 
3 out of 5
3 out of 5
Reliability: 
1 out of 5
1 out of 5
Thompsons Roof Seal
9 Dec 2008
By haqster
, NE4 9RR
"I've got leaky flat roof so I bought this because it's a known brand, but I was wrong. I suppose it works if there is a little drizzle but with normal/heavy down pours the water breaks through the so called protective barrier.
The actual sealant is like a thick paint I expected it to be really thick like glue.
"
3 of 4 people found this review helpful.