MICA MC-634 is an aqueous emulsion that passes the ASTM D6400 standard for compostability. It is designed to function as a sealing layer or adhesion promoter applied to paperboard substrates for adhesion to PLA and PHA resins and films. It may also find use as a primer applied to paper, and bio-based metalized and non-metalized films, for adhesion of PLA and PHA extrudates.