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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€45.45 Incl. 20% VAT

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Isoflex Isoflex Liquid Rubber Black 2.1Ltr is rated 4.6 out of 5 by 32.
Rated 4 out of 5 by from Roof comes bouncing back This liquid rubber is brill. Stir well and then fix your leaking roof ! Have also used as an external coating on bricks where damp proof course wasn't high enough. (For a French Drain)..throw brush away - don't bother with cleaning it..
Date published: 2018-07-05
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 Top Roof Repair I have used this product for the first time on a DIT job at home after reading the reviews posted and is wort all 5 stars Yes it seems a little expensive but really does give a permanent seal. Best applied with a paint brush thinly, leave to dry overnight and then give it one more coat but not necessary. You can also use this as a great finishing. This product saves time and is Half the price of a new roof.
Date published: 2018-01-17
Rated 5 out of 5 by from Unbeatable product Have used this on several jobs now including at home. Yes it seems a little expensive but really does give a permanent seal. Best apply with a paint brush thinly, leave to dry overnight and then maybe if you are unsure give one more coat but likely to be necessary. You can also use this as a great finishing product if use a roof renovator and then seal all the edges with this product. Half the price of a new roof yet same long lasting!
Date published: 2017-08-20
Rated 5 out of 5 by from Beat the leaks. Heavy rain, leaky roof. Next day delivery. Soon applied Quickly dried. Problem solved. Excellent product, have used before and can really recommend
Date published: 2017-07-14
Rated 1 out of 5 by from Water absorption problem Hi, Firstly, I would like to mention that isoflex was applied according to the instructions on the can and the surface was cleaned before application. It rained 4 days after application. After 2 weeks, I realised that isoflex turned to greyish colour. When I closely examined, the thick regions turned to sponge with water absorbed inside. Water bubbles were coming from inside when I apply pressure with my finger, and that's why the colour turned into greyish. Polymers absorb humidity, but this amount of absorption and change of chemical composition is unacceptable. Furthermore, it is not a cheap product. Now I have a roof with scattered grey colour regions. Please avoid this product. I can send you photos of the result.
Date published: 2016-09-30
Rated 4 out of 5 by from Very good Tried a few other roof sealers but none are as tough and rubbery as this. It's reassuringly thick to apply and plugs any flat roof leaks you can find. The only downside is it's quite expensive but if it last 5 years it's paid for itself.
Date published: 2015-01-19
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