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Isoflex Isoflex Liquid Rubber Black 2.1Ltr Product Code: 36010

2.1Ltr. Permanent, highly flexible, black, waterproof coating for roofs. Five times more flexible than bitumen. Adheres to virtually all roofing surfaces and does not crack, peel or perish.


  • Primer Required
  • Suitable for Roofing
  • Long Lasting
  • Model No:
  • High Odour
  • UV & Weather-Resistant


Curing time: Touch-Dry in 12-24 Hours. Coverage: 1sqm per litre.
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Safety Data Sheet
Additional Information
Technical Specification
  • Resistant Type : UV & Weather-Resistant
  • Brand : Isoflex
  • Product Type : Isoflex Liquid Rubber
  • Suitable Application : Suitable for Roofing
  • Volume : 2.1 Ltr
  • Total Product Weight : 2.539 kg
  • Coating & Finishes Drying Time : Touch-Dry in 12-24 Hours
  • Colour : Black
  • Pack Size : 1
  • Manufacturer Guarantee : 20 Year Manufacturer's Guarantee (T&Cs Apply)
  • Pieces in Pack/Case : 1
Product Contents
Delivery & Returns


Standard delivery: €15

Free delivery on all orders over €70.00

Click here to see information on our delivery charges and times



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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€46.45 Incl. 20% VAT

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Isoflex Isoflex Liquid Rubber Black 2.1Ltr is rated 4.8 out of 5 by 16.
Rated 5 out of 5 by from Brilliant I used this product 20yrs ago in Ireland for a few years, then my supplier stopped getting it , he told me it was discontinued, which was obviously not true , and now I’ve found it again on screwfix , I can tell you there is no better product for fixing flat roofs , I have sealed roofs twenty yrs ago with this and they are still holding,this product is so good you can seal a boat with it , I used to say to my mates , the product is so good it would do roofers out of work
Date published: 2019-09-03
Rated 5 out of 5 by from Does exactly what it says on the tin! This is a great product, easy to apply. Just get a good stir up! Stopped leaks in roofs in no time!
Date published: 2018-02-06
Rated 5 out of 5 by from Excellent product I have used this product every so often over the years. I work in property maintenance. It is an excellent product, but not that well known. The only problem is that it can be on the shelf a long time and needs a very good stirring before use and removal of skin that forms and then sinks to the bottom of the can. The other problem is the awful Irish winter weather. Have had to wait for two dry days in a row { Hens teeth are more common } and then prepare roof with a blow lamp to make sure it was thoroughly dry. Worked a treat though, with excellent results.
Date published: 2018-02-05
Rated 5 out of 5 by from Great Product This is the second time we have bought this product and it is excellent.Perfect for leaky roofs, we used it on another property before...no more leak.
Date published: 2014-06-12
Rated 3 out of 5 by from 48 hours no rain It says on tin : " Surfaces should be clean and dry, with rain unlikely for at least 48 hours. " What :) ??? Should not be sold in Scotland IMHO :)) But I'm sure that it does a good job in dry weather. If you need repair with reinforced fibres you should buy FLEXACRYL (screwfix) instead. That works in all weather.
Date published: 2011-09-07
Rated 4 out of 5 by from Great for leaky roof I used this to cover a section of felt covered roof with ridges. It's really thick stuff so do stir well throughout application otherwise by the time you get to the bottom it will be really thick. Being thick it's good for areas which are not totally flat. You will need to throw your brushes away afterwards so but some cheap ones. One point to note it does not keep very well as starts to cure within a few days in the tin.
Date published: 2011-09-06
Rated 5 out of 5 by from Not cheap but excellent I had a annoying leak and decided to seal the roof, I decided to give isoflex a go as the reviews were excellent. Glad I did as a week after doing the roof loads of rain and no leak. Good stuff
Date published: 2011-08-21
Rated 4 out of 5 by from We wait to see Applied Isoflex to my concrete finlock gutters. Easy to apply, I was concerned that Iosflex would be very stick and difficult to brush on, but no problem. Finish looks great and fingers crossed this will do the job that bitumen sealant hasn't. Now waiting to see how the gutters perform in the winter
Date published: 2011-06-11
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