Soprema, Soprastick SI Unilay Elastomeric Bitumen Waterproofing Membranes

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SOPRASTICK® SI UNILAY is a flexible lightweight SBS elastomeric bitumen waterproofing membrane with a composite glass/polyester reinforcement.


The self-adhesive strips on the underside of SOPRASTICK® SI UNILAY are protected by a silicone release film and the membrane is self-protected by slate chippings on the topside. SOPRASTICK® SI UNILAY includes a double overlap, selfadhesive overlap + torched or heat welded ensuring an easy and reliable installation. 



- security: no contact of the flame with the support, 

- reliability: flexible and resistant composite reinforcement, 

- the SBS elastomer bitumen guaranties flexibility when cold, 

- excellent adherence when cold, 

- easy application.


• SOPRASTICK® SI UNILAY is used as a single self-protected layer, on concrete substrate, wood, polystyrene or polyurethane heat-sensitive insulation.

• All the applications are described in the French Standards DTU, Technical Guidelines or Technical Approvals. For further details refer to specific technical information.

• SOPRASTICK® UNILAY can be laid semi-independently by adhesion onto insulation, or a suitable primer (ELASTOCOL® 350 or ELASTOCOL® 600) for concrete or wood; the self-adhesive part of the overlap must be laid and the second part must then be torch-on or welded with hot air. Hot bitumen must not be used in the bonding process.


- Roll dimensions: 7 m x 1 m 

- Roll weight: about 36 kg 

- Colours: grey or black slates 

- Storage: upright on pallet with plastic wrapping, protected against moisture