)A decade ago, the International Agency for Cancer Research reclassified formaldehyde from a suspect carcinogen to a known carcinogen. Research support from the United Soybean Board led to the development of a soy-based formaldehyde-free resin that bonds wood like a mussel to a wet rock. The technology has been used in more than 50 million formaldehyde-free plywood panels. Soy-based adhesives are water-based systems formulated with natural soy flour and a proprietary crosslinking resin. When blended together, the resin reacts with the protein in the soy flour to form a durable, water-resistant thermoset adhesive that is comparable in strength and performance to urea-formaldehyde-based adhesives.