Dyna-Stix® WDU+ is a low-VOC, one-component, moisture-cured urethane adhesive designed for use on high moisture slabs. It is ideal for installing multi-ply engineered wood, high-density fiber board core wood, acrylic impregnated wood plank, finished and unfinished solid wood flooring (with manufacturer approval for glue down installations), parquet, and bamboo over properly prepared concrete substrates. When installing solid wood flooring directly to concrete substrates, follow NWFA guidelines. Dyna-Stix WDU+ is intended for use over bare concrete substrates only. Its superior strength and elasticity provide quieter, cushioned floor installations. This adhesive is designed for easy trowel-on, non-slump application.