Abstract: A disclosed adhesive contains non-functionalized lignin and natural rubber latex in an aqueous medium having pH ?9. The aqueous medium may further include 0.1% to 3% by mass of at least one alkali selected from the group comprising ammonium, sodium, calcium, magnesium, potassium hydroxides, and a salt such as sodium bicarbonate. A mass fraction of lignin may be between 0.1 and 20%, and the adhesive may include cellulose particulate material having sizes in a range between 5 ?m and 5 nm, and/or fibrillated cellulose, and/or crystalline cellulose. The cellulose may have a dry mass fraction between 0.05 and 5%. A method of manufacturing may include forming a mixture by adding solid, non-functionalized lignin to a colloidal dispersion of natural rubber latex in an aqueous medium having pH ?9, and stirring the mixture for a period of 10 to 20 minutes at room temperature and pressure.