What is the best adhesive for engineered floor boards?

Bona Quantum is widely considered to be one of the best "all-rounder" adhesives on the market today and is the direct replacement for the Bona R850 Adhesive that has now been discontinued. It has good initial grab and is perfect for engineered and solid wood planks and parquet. It causes practically no swelling of the wood as it's water and solvent free.

Osmo MS Advance Wood Floor Adhesive is another similar adhesive also formulated for the installation of interior wood block parquet, engineered wood plank and pre-finished and unfinished solid wood flooring. It has a moisture inhibitor and some sound reducing properties.