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 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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€37.45 Incl. 23% VAT

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Isoflex Isoflex Liquid Rubber Black 2.1Ltr is rated 4.5 out of 5 by 27.
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
Rated 5 out of 5 by from Amazing product Have used a few tins of this recently, although it's not cheap it is incredibly good... Really easy to apply (although need to chuck the brush after, so use a cheap one..!!) Have used for repairs in rubber roofs, felt roofs and sealing suspect edges and in every instance has worked perfectly all I would say is that you have to give it a really good stir first off
Date published: 2014-10-09
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 more leak.
Date published: 2014-06-12
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 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
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