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Sarnafil G476-SA

Sarnafil G476-SA

Third party certifications:
  • BBA Agrément Certificate

    BBA Agrément Certificate

    Certificate type

Sika Sarnafil

Self-adhesive PVC-P single-ply membrane with a foam backing, for inverted ballasted applications.

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+44 (0)1707 394444 www.sarnafil.co.uk

Self-adhesive PVC-P single-ply membrane and a foam backing coated with a pressure-sensitive adhesive, for inverted ballasted & green roof systems.

Sarnafil G membranes are manufactured using a state of the art extrusion coating process that eliminates shrinkage and plastic memory and produces a dynamically stable membrane.


Certified by BBA, in their opinion, to have a "life expectancy in excess of 40 years" for exposed applications, with periodic maintenance as stated below.

"A planned maintenance cycle, including inspections by the Certificate holder at minimum intervals of five years, should be introduced if an extended service life is required. The Certificate holder can advise on methods of extending the service life. This could include the use of thicker membranes, specific maintenance requirements or localised replacement and repair."

Should the maintenance cycle not be followed Sarnafil G/S membranes have been given, by the BBA in their opinion, a life expectancy of "in excess of 35 years".


Sarnafil G476-SA is self-adhered directly to approved substrates primed with Sarnafil Primer 610/600. Side laps are heat welded using the 80mm wide salvage edge, end joints are butted together and weathered using Sarnafil G410-EL membrane.

Installation is carried out by Sarnafil trained contractors.

General information

Uniclass 2015

Pr_25_57_51_66 Polymeric membranesPrimary


J42/120 Inverted roof covering

J42/400 Waterproof membrane

Specification data - Polymeric membranes

Product Reference

Sarnafil G476-SA


Signal Red


Sarnafil Constant Force post

Sarnafil heat weldable lightning conductor clips


Sarnaplast 2235

Primer 110

Double L rainwater outlets

G/S rainwater outlets

Standard product features


3.0 mm overall thickness.


2.0 m.

Length of roll:

20 m.


2.20 kg/m².

Product Options


Available in standard colour only.


  • Sarnafil Constant Force post: Cable-based fall arrest and restraint system.
  • Sarnafil Double L: High drainage capacity insulated rainwater outlet.
  • Sarnafil heat weldable lightning conductor clips.
  • Sarnametal: Galvanized metal sheet with Sarnafil G410-12EL factory laminated to it, for use in prefabricated flashings and drip details.
  • Sarnaplast 2235: Elastic one-part silicone sealant for sealing edges and perimeter upstand flashing terminations.
  • Primer 110: Surface primer creating a key for Sarnaplast 2235.
  • Double L rainwater outlets: Insulated outlets.
  • G/S rainwater outlets: Injection moulded PVC outlets and scuppers.

Third party certifications
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