Hydrostop EU AH-25 Liquid Waterproofing is the Superior Choice

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What is Hydrostop EU AH-25?

  • A wet-on-wet, cold applied liquid waterproofing product
  • Fully reinforced with a polyester fabric
  • Free of solvents and isocyanates
  • Very low in VOCs, fume free, virtually odourless
  • Custom colours to order
  • Alternative to coloured single ply
  • It’s exclusive to SIG Design and Technology

 How is Hydrostop EU AH-25 supplied?

  • No waste – a single liquid product in a re-sealable tub
  • Exclusive to SIG Design and Technology

Where should I use AH-25?

  • Refurbishment to existing roofing e.g. over built-up felt systems, mastic asphalt, single ply, profiled metal or fibre cement
  • For repairs where existing roofing material has failed
  • For complex roofs, including new build e.g. complex detailing, upstands, edge details, penetrations and terminations. Where there’s roof-mounted plant. On balconies where single ply’s difficult to detail
  • On inverted roofs including roof gardens, it’s roof resistant and FLL approved (root resistant)
  • For combined pitched and flat roof applications of S1-S4 (<5% to >30%)
  • Where single ply, felt roofing or hot melt is not suited

 What is Hydrostop EU AH-25’s customer appeal?

  • No hazardous chemicals – can be used on sensitive projects e.g. schools, hospitals and food production etc.
  • No need to disrupt building occupancy
  • No heat or flames during installation
  • BBA certified & fire tested to DD ENV 1187:2002 ( Fire Rating Is BroofT4)
  • 25 year warranty from SIG plc (extendable)
  • AH-25 can perform for lifespan of building
  • Can only be applied by an AH-25 approved contractor

What is Hydrostop AH-25’s Installer Appeal?

  • Virtually odourless & fume free
  • No additional respiratory PPE at installation
  • Ideal for complex detailing/hard to access areas
  • Convenient and ready to use
  • For combined pitched and flat roof applications of S1-S4 (<5% to >30%)

and surface temperatures down to 0°C

  • Cold applied, fast curing, can apply wet on wet
  • No waste – a single liquid product

About Hydrostop AH-25 Installer Training

  • Can only be installed by AH-25 trained operatives
  • One day course comprising theory and practical
  • Operatives tested on theory and practical skills
  • Opportunity to join DATAC accredited installer scheme
  • Only DATACs are offered SIG warranties & technical support

Typical Hydrostop AH-25 Applications

  • Schools
  • Offices
  • Healthcare
  • Military installations
  • Sports facilities
  • Flats and condominium roof terraces
  • Domestic properties

How can I find out more on liquid waterproofing?

Download the new AH-25 brochure at  www.singleply.co.uk/flat-roofs/hydrostop-eu-ah-25/

Read more about the benefits of liquid roofing and other flat roofing materials at www.singleply.co.uk/blog/

eight steps to guide

To support SIG customers whatever the project, SIG Design & Technology has put together an 8-step guide to identify the challenges and ensure that a roof’s design meets a building’s requirements. Called “#Perfect Roof”, the eight steps follow the process from product selection and design expertise through to full guarantees and planned maintenance. This know-how is just part of the service that is provided absolutely free to customers and includes green roofing.

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