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Water Cut-Off Mastic (Sure-Seal)
Availability: In Stock
Excl. VAT: £6.50 Incl. VAT: £7.80
For delivery on Tuesday 25th of September 2018, order this item in the next .
(£6.50 + VAT )
Provides a durable compression type seal between various membranes and parapet wall constructions.

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  • Product Info
  • Technical
  • Installation
  • Things You Will Need

The Water Cut-Off Mastic is designed to be used in conjunction with roofing and waterproofing systems. Typically, it is used as a sealing agent between ClassicBond® membranes. The Water Cut-Off Mastic can also be applied when an EPDM sheet is being terminated using a compression type seal.


Benefits of Water Cut-Off Mastic:



  • Very tacky

  • Provides a durable compression type seal

  • Easy to apply


Coverage: one tube will cover 3 linear metres.


Use the Water Cut-Off Mastic for extreme tackiness that lasts years.


The ClassicBond® Water Cut-Off Mastic will cover 3 linear metres of surface and should only be used as compression type mastic. Each tube has a volume of 0.3L.


Manufacturer: ClassicBond®
Solids: 80%
Colour: Grey
Flash point: 4°C closed cup
Service temperature: -40°C to 93°C
Shelf life: 1 year unopened
Coverage: 3 linear metre per tube
Clean up: Weathered membrane cleaner


Any surfaces that you use the ClassicBond® Water Cut-Off Mastic must be free of oil, dirt and loose materials.

How to Apply:



  • Apply 11mm bead of the Water Cut-Off Mastic between the edge of the membrane and the substrate you want to fit

  • Now, securely connect the right termination material using constant compression


As EPDM membranes installations are flame free and easy to fit, you won't need any expert tools. However to use the ClassicBond® Water Cut-Off Mastic, we recommend various accessories.