Caltech Liquid Roofing

Caltech Warm Roof


Caltech is a flame-free, single component, self-levelling polyurethane liquid waterproofing solution.  Cold applied to form an elastomeric, seamless membrane, Caltech will waterproof virtually any substrate.

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Key Features & Applications

  • Euroroof Caltech is a flame-free, BBA approved, fully warranted system with a life expectancy of up to 25 years
  • It can be used to refurbish failing roof coverings or to provide waterproofing for new-build podium decks, balconies and walkways. It can also be used under green roofs and is suitable for pedestrian traffic 
  • The Caltech system is fully adhered for a durable, yet flexible monolithic waterproofing solution and offers excellent resistance to puncture, abrasion, micro-organisms and chemical agents 
  • Euroroof Caltech has the appearance of a smooth, plain colour with mid-sheen finish


  • Euroroof Caltech is reinforced with a chopped strand emulsion bound fibreglass fabric to ensure excellent mechanical properties and dimensional stability, maximising durability.


  • Euroroof Caltech is a cold-applied liquid polyurethane with a high solids content. With embedment of the fibreglass reinforcement, the liquid bridges over undulations, fissures and vulnerable points within the existing roof, forming a seamless waterproofing membrane.
  • Euroroof Caltech, when tested in accordance with BS 476-3:1958/2004, achieved the highest available EXT.F.AA rating and can therefore be used without restrictions according to the Building Regulations.


  • Euroroof Caltech is compatible with PIR insulation (warm roof) and extruded polystyrene (inverted roof)

Installation & Maintenance

  • Installed by a nationwide network of Euroroof Caltech registered contractors
  • Euroroof Caltech is a flame-free system and as such is cold-applied using roller or airless spray
  • A range of primers are available for adhesion to substrates such as concrete, metal, plywood, existing roof membranes
  • Only minimal routine maintenance is required

Quick Tip

What other cold-applied options do Alumasc provide?

Euroroof Caltech QC (Quick Cure range) is available for existing Balconies, Walkways and Flat Roofing. These systems have extremely quick curing times, a wide variety of finishes and system build-ups that can be applied to most substrates.

White House Works, Bold Road, Sutton, St Helens, Merseyside, WA9 4JG


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