Sika BlackSeal Elastic Damp Proof Membrane
- Appraisal number 770
- Valid from
- Information provider
- BRANZ Limited
- Information type
- BRANZ Appraisal
Sika BlackSeal Elastic is a water-based bitumen emulsion modified with acrylic latex polymer used as a a damp proof membrane behind basement and retaining walls to prevent water vapour penetrating to the interior.
Sika BlackSeal Elastic has been appraised as a damp-proof membrane behind concrete masonry basement walls complying with NZS 4229.
Sika BlackSeal Elastic has also been appraised for use as a damp-proof membrane on buildings subject to specific design within the following scope:
- where the design of the building will be the responsibility of the building designer; and,
- with clean, sound, continuous substrates of insitu or precast concrete complying with NZS 3101 and AS/NZS 1170 or concrete masonry complying with NZS 4230 and 4210; and,
- where the membrane is adequately protected against damage during backfilling and in service; and,
- where subsoil drainage and free draining granular backfill has been placed behind basement walls.