UNDERSEAL™ Blindside Waterproofing Membrane is a three layer system, usually installed against vertical drainage boards which are fastened to lagging. Flow 15P & Low Flow drainage boards.

1. A very high strength and puncture resistant, but conformable, polyethylene film layer is installed against the drainage board.
2. A thick layer of elastomeric, stress absorbing polymerized sealant is adhered to the high strength polyethylene.
3. A high strength geotextile is the last layer. This geotextile forms a physical bond to the concrete foundation wall poured against it

As of 9/1/2003, Polyguard Products' quality system has been certified to American, Dutch, and German quality systems requirements:
- American Natl. Standards Institute
- Dutch Council for Certification
- Deutscher Akkreditierungs Rat