Polyprufe® BSW is a high-performance HDPE Blind-Side waterproofing membrane designed for applications where the waterproofing must be laid prior to pouring of the concrete.
It allows for fully-bonded waterproofing membrane to be applied to the positive-side of the building structure even where the said surface is inaccessible to application personnel.
Polyprufe® BSW should be adhered with the film side to the substrate. On vertical surfaces, the membrane is to be mechanically fastened to the top of the structure first before applying subsequent layers. Overlaps should be staggered in order to prevent a bulge forming, and all succeeding layers must be clean and dry before application in order to ensure a strong, watertight bond.
The substrate should be mechanically sound and not move during the pour. The substrate should also be smooth with no gaps or voids. Any penetrations should be grouted in order to ensure stability. Before the pour, ensure that all plastic release liners are removed. Ensure that no sharp objects are used to consolidate the concrete in order to prevent damage to the membrane.
Test Method | Typical Value | |
Membrane thickness | DIN 53353:1979-12 | 1.2 mm |
Dimensional stability | SS 374:1994 | <0.4 (long.) <0.4 (trans.) |
Tensile strength | SS 374:1994 | >30 N/mm2 (long.) >36 N/mm2 (trans.) |
Elongation at break | SS 374:1994 | >980% (long.) >1350% (trans.) |
Resistance to hydrostatic test | DIN 16726:2011 | >50 m – no leakage |
Puncture resistance | ASTM E154/E154M: 2008a(2013)e1 | >1000 N |
Peel adhesion to concrete | ASTM D903:1998 (2010) | >1200 N/m |
