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Viking Lybra SBS TorchOn Membrane

Viking Lybra SBS is a robust and versatile membrane system ideally suited to New Zealand's South Island and the North Island's Central Volcanic Plateau. The elastomeric ('rubberised bitumen') properties of Viking Lybra SBS are ideal for the waterproofing requirements of buildings situated in areas subjected to climatic extremes.

Viking Lybra SBS consists of a 3mm thick base sheet. A 4mm ceramic chip cap sheet is then installed on top in the same way as the Gemini APP system.

Key Features
  • Cold Flexibility Range: -15°C up to +120°C
  • Total Thickness: 7mm
  • Roll Width: 1m
  • Roll Length: 10m
  • Colour: Black and Grey
  • Installed only by Viking Licensed Applicators
  • UV resistant
  • Thermal ageing resistance
  • Dimensional stability
  • Tensile resistance
  • Overlay option
  • 20 year product warranty
  • BRANZ Appraised (Appraisal No. 948)
NZ-Owned Business
NZ-Owned Business
Scope of Use

Viking Lybra SBS is suited to tricky / confined roofs where it can be 'bled' in to vulnerable areas such as tight corners and awkward areas susceptible to leaks such as roof penetrations, internal corners and gutter junctions.

It is suitable for low-slope roofs (flat or curved), gutters and parapets, waterproofing beneath a floating deck, inland and coastal conditions, commercial and residential buildings.

Viking Lybra SBS Waterproofing Membrane has been assessed as a roof waterproofing membrane on buildings within the following scope:

  • The scope limitations of NZS 3604:2011 and NZBC Acceptable Solution E2/AS1, Paragraph 1.1; or,
  • The scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with regards to building height and floor plan area when subject to specific structural design; and,
  • Situated in NZS 3604:2011 Wind Zones, up to and including Extra High; and,
  • With substrates of plywood or suspended concrete slab; and,
  • With a minimum fall for roofs of 1:30 (2 degrees)
Limitations on Use

Viking Lybra SBS is primarily designed for zone 3 (South Island and Central North Island volcanic plateau). It can be installed in other regions and we recommend, in the first instance, that you discuss this with Viking Roofspec.

The system must be installed by a Viking Roofspec Trained and Approved Installer.

Statement of Building Code Compliance
  • Clause B1 STRUCTURE: Performance B1.3.1 and B1.3.4 (b) (c) (d) (e) for the relevant physical conditions of B1.3.3 (p). Viking GM Lybra S.B.S Waterproofing Membrane meets this requirement.
  • Clause B2 DURABILITY: Performance B2.3.1 (b), 15 years. Viking GM Lybra S.B.S Waterproofing Membrane meets this requirement.
  • Clause E2 EXTERNAL MOISTURE: Performance E2.3.1, E2.3.2 and E2.3.7 (b) and (c). Viking GM Lybra S.B.S Waterproofing Membrane meets these requirements.
  • Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Viking GM Lybra S.B.S Waterproofing Membrane meets this requirement and will not present a health hazard to people.
Other Performance Attributes
  • BRANZ Appraised (no. 948, 2017);
  • Viking Lybra SBS is backed by a 20-year product warranty and for specific projects, is eligible for Viking's Full System Warranty, which covers the product and installation in one document;
  • The bitumen used in Viking Lybra SBS is a bi-product of the oil refining process, providing a constructive use of this waste product;
  • A Viking Lybra SBS roof can be overlaid at the end of its useful life, avoiding the dumping of the old roof and the filling of landfills with inorganic waste.
B1 Structure compliant
B2 Durability compliant
E2 External Moisture compliant
External Moisture
F2 Hazardous Building Materials compliant
Hazardous Building Materials
BRANZ Appraised
BRANZ Appraised
Viking Products Material Safety Data Sheets


Product Technical Statement
Specification Clause (Masterspec)
BRANZ Appraisal 948

948 [2017] amended 2019

CodeMark Certificate

GM-CM30092- RevA

Code of Practice
Find an Approved Installer
Substrate Checklist: Concrete
Substrate Checklist: Plywood
Substrate Checklist: Strandsarking
Maintenance Instructions
Brochure: Viking TorchOn
Additional Information
Case Study - 'The Peak' Queenstown Hill
Case Study: 'Happy Valley' Whakapapa
CAD/PDF Details
Viking Torch-On Details Full Set

For over 50 years, Viking Roofspec have supplied roofing and waterproofing materials, and combining leading-edge function with design flair to keep water out — for good.

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