Not going to overstress the substrate as the wood expands, yet return a shrinking floor. The original roofer used asphalt that turned brittle, then as the wood changed dimension during season changes, the floor popped loose. Even though extremely strong, as the wood moves the substrate fractures and there goes the floor. Polyurethanes that are strong, elastic, age well and are water resistant, but are sometimes toxic, always costly, and difficult to use. Latex emulsion sounds like a mix of rubber with solvent or water.
Solvents sound dangerous and expensive.
Thus we have come full circle, back to our crystal ball. The adhesive system of the future will be a water emulsion latex designed to eliminate warp and grain raise of wood floors. Another major consideration in the future will be waste disposal, particularly containers. As a matter of fact he already is one. Many of these waste collectors have been trained to keep their eye open for dumpster disposal of hazardous materials and they are notifying the EPA when they find them, resulting in some very costly situations for everyone involved.