NATURAL STONE CARE & CLEANING GUIDE
Cleaning with a Poultice:
What is a Poultice?
A poultice is a paste that used to draw
out the stain into the absorbent material. It is made by
mixing a liquid cleaner or chemical with an absorbent
material. Kaolin, Fullerís earth, whiting, diatomaceous earth,
powdered chalk, white molding plaster, talc, white cotton
balls, white paper towels or gauze pads can be used to make
a poultice. One pound of poultice is enough to cover one square
foot area. Do not mix acidic chemicals with whiting or iron
type clays such as Fullerís earth because the reaction will
reduce the effect of the poultice.
How to Make and Apply a Poultice:
Mix powder with chemical to a thick paste until the
consistency of peanut butter is achieved. If you are using
cotton balls or paper towel, soak and drain the material.
Spray distilled water onto stained area.
Apply ľ to Ĺ inch poultice to the area covering about one inch
Using several layers of film or plastic, cover the poultice
and seal it by taping the edges.
Wait until poultice is dry (24 to 48 hours).
Remove plastic cover and let poultice completely dry.
Remove poultice (use wood or plastic scraper if necessary) and
wash area with distilled water and dry with a soft cloth.
If the surface is etched by poultice please refer to etch
marks section of this manual for instructions. Some stains may
require up to five applications. Repeat this process if stain
is not removed. If the stain is too difficult to remove by
using poultice please call professionals for alternative
Care and cleaning of natural stone surfaces, 2005. Marble
Institute of America.