Sarnafil S327-EL

Sarnafil S327-EL

Sika Sarnafil Third party certifications:
  • BBA Agrément Certificate

    BBA Agrément Certificate

    Certificate type

PVC-P single-ply membrane with polyester reinforcement, for mechanical fastening.

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PVC-P single-ply membrane for mechanical fastening.

Sarnafil S membranes are manufactured using a state-of-the-art extrusion coating process that eliminates shrinkage and plastic memory, and produces a dynamically stable membrane. In the coating process, a polyester scrim carrier is coated on both sides with liquid Plastisol, prior to the application of a lacquer coating on the upper surface and laser marking of the membrane for identification. The unique lacquer coating eliminates the need for biocides, provides the membrane with an easy-to-clean surface and prolongs the life of the membrane by reducing plasticiser loss.

The process enables between 2 and 5% of recycled material to be used in the production of new membranes.


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, in the opinion of the BBA, a life expectancy of 'in excess of 35 years'.


Sarnafil S327-EL is mechanically attached to the substrate using either the Sarnafast or Sarnabar system and Sarnafil SFT or SBT tube fasteners. Laps are then hot air-welded to form seams which are stronger than the membrane itself.

Installation is carried out by Sarnafil-trained contractors.

General information

Uniclass 2015

Pr_25_57_51_66 Polymeric membranesPrimary


J42/10 Warm deck roof covering

J42/110 Warm deck roof covering

J42/130 Cold deck roof covering

J42/400 Waterproof membrane

Specification data - Polymeric membranes

Product Reference

Sarnafil S327-EL


1.2 mm

As standard.

1.5 mm

1.8 mm

2.0 mm


Azure blue (nearest RAL 5009)

Copper brown (nearest RAL 8004)

Copper patina (Sika colour 6525)

Lead grey (Sika colour 9500)

Light grey (nearest RAL 7047)

Traffic white (nearest RAL 9016)

Traffic white RAL 9016 SR (solar reflective)

Window grey (nearest RAL 7040)



Double L rainwater outlets

G/S rainwater outlets

Primer 110

Sarnafil Constant Force post

Sarnafil heat weldable lightning conductor clips


Sarnaplast 2235

Standard product features


2.0 m.

Length of roll:

20 m: 15 m for 1.8 and 2.0 mm-thick membrane.


  • 1.2 mm-thick: 1.50 kg/m².
  • 1.5 mm-thick: 1.90 kg/m².
  • 1.8 mm-thick: 2.30 kg/m².
  • 2.0 mm-thick: 2.40 kg/m³.

Product Options


1.2 mm standard thickness. Ballasted applications require a membrane at least 1.5 mm thick.


Available in standard colours. Other colours may be available, subject to a lead time and minimum order quantities.


  • Double L rainwater outlets: Insulated outlets.
  • G/S rainwater outlets: Injection-moulded PVC outlets and scuppers.
  • Primer 110: Surface primer creating a key for Sarnaplast 2235.
  • 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.

Third party certifications
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