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XtraFlex System - Cold-applied liquid waterproofing

Verified by manufacturer 3 months ago

Polyroof Products Ltd

A cold-applied liquid membrane waterproofing system for flat metal roofs and gutters.

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+44 (0)1352 735135 Website


Suitable for virtually all metal roof and gutter surfaces, and concrete Finlock gutters.


XtraFlex is a based on Polyroof’s tried and tested Protec technology and adapted with enhanced flexibility, making it ideal for the coating of industrial gutters and other high-expansion applications.

The RapidCure technology utilizes catalyst, accelerators and inhibitors allowing full control over cure times across a wide range of temperatures all year round. The seamless Xtraflex membrane can be applied directly to virtually all metal surfaces, concrete finlock gutters and a range of other industrial roof or gutter surfaces. It is impervious to standing water, making it ideal for areas that may hold standing water. XtraFlex is supported by Polyroof’s Approved System Guarantees for up to 20 years.

Features and benefits:

  • Enhanced flexibility suitable for industrial gutters: A highly flexible version of the Protec system capable of withstanding the expansion and contraction movements of metal substrates.
  • Impervious to standing water - suitable for gutters and other applications where standing water may occur, the presence of water ponding over the membrane has no detrimental effect on the performance of the waterproof membrane.
  • RapidCure Technology - fast application with cure times as low as 30 minutes.
  • Seamless waterproof membrane - applied as a liquid, Protec forms a seamless waterproof membrane with no joints, no welds and no weak points.
  • Cold-applied installation with zero risks from hot works: Unlike many traditional roofing materials that require open flame hot works to install, Protec is fully cold-applied meaning there are no risks of accidental fire during installation.
  • BBA Certified (Certificate no. 23/6749) with a certified lifespan of at least 25 years.
  • Manufactured in accordance with BS EN ISO 9001:2015 and BS EN 14001:2015.

Please consult manufacturer for further specification advice as required.

General information





Seamless, watertight finish.



Flexible hybrid polymer.


Please refer to project specific drawings. Formed on site.



Please refer to project specific drawings. Formed on site.



Formed on site. Approximately 3mm thick once cured.


Warranty description

20 year

Labour and materials.


Ss_30_40_30_40 Liquid-applied cold roof covering systemsPrimary


J31/5 Cold deck roof coating

J31/110 Cold deck roof coating

Specification data - Liquid-applied cold roof covering systems



Horizontal work

Please consult Polyroof for guidance and insert requirements.


Skirtings and vertical work

Please consult Polyroof for guidance and insert requirements.


Liquid-applied waterproofing



Cold liquid-applied XtraFlex resin with catalyst (two coats).


Polymat 450 (first coat).

System accessories

Polyroof pre-formed GRP trims - drip/ upstand.

Polyroof pre-formed GRP trims - fillet.

Polyroof pre-formed GRP trims - termination bar.

Polyroof pre-formed internal outlets.

Polyroof pre-formed through wall outlets.

Polyroof butyl lap and bolt tape.

Protec Matrix - detailing system.

Polyroof fall arrest systems.

Consult manufacturer for options and insert requirements.

Polyroof SA lightning conductor clips.


Light grey.

Cure time

30–60 minutes.

Cured state of tough & impermeable.

Application temperature



Metal surface.

Primed with Polyroof Quick Dry 2-Pack Epoxy Primer.


XtraFlex resin.


Installation by Polyroof approved contractors.

Sustainability data

Country of material origin

United Kingdom

Country of product manufacture

United Kingdom

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Platform Compatible Version





Polyroof Seamless Waterproofing Solutions

Polyroof Seamless Waterproofing Solutions

Modular Construction Solutions

Modular Construction Solutions

Case studies

St Stephen’s Primary School

St Stephen’s Primary School

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