Installed prior to slab pour, UNDERSEAL™ Underslab Waterproofing Membrane contains 3 layers of protection.

1. The bottom layer is a 20 mil geomembrane, highly puncture resistant and stretchable.
2. The middle layer is a 65 mil polymerized asphalt sealant, which acts as a seal and an elastomeric stress absorbing formulation. This is the primary material which guarantees a permanent seal when the concrete cracks or the joint moves above the membrane.
3. The top layer is a high strength geotextile which forms a physical bond to the concrete slab poured on top of 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