Casein adhesives date back to the early 1900’s. Casein is a natural protein derived from milk by-products and was the standard bonding agent for wood products before synthetic resins and adhesives came of age. Caseins are still valued by manufacturers for their durability, water resistance and non-toxicity.
Casein adhesives are supplied as powders that are then solubilized in water by the end user and can be optimized with modifiers.
They are typically used for flush doors and provide great assembly time tolerance compared to precatalyzed polyvinyl acetate.
Caseins require no waste stream. All wash water is used up in the manufacturing process, relieving users of the need to pay for disposal or recyling.