Clean Horse Hair for your lime plaster basecoat! All natural horse hair, cut to approximately 8″ lengths. Each bundle weighs approximately 3/4 of a pound. Before adding to plaster, cut the hair to 1/2″ to 1″ lengths. Mix into basecoat at time of application. Use in one application. If hair is kept in the wet Lime Plaster Basecoat, the lime will begin to dissolve the hair and it will putrefy. Animal hair and/or polypropylene fibers give Lime Plaster Basecoat lateral strength.