Poulticing Materials

Kaolin Colloidal

The problems in cleaning stone and other porous surfaces are numerous notwithstanding the very nature of the stone specie and the type and extent of its damage. The general nature and source of dirt on the stone must be determined in order to remove it in the most effective, yet least harmful, manner. Types of ”dirt” include soot, smoke, leached salts, rust and organic stains, products of chemical attack from air pollution, micro-organisms and various applied coatings of paint, wax, etc. Stubborn dirt can be treated in a variety of ways including chemical cleaners and abrasives. Each method has its advantages and drawbacks. The safest of all stone cleaning methods is poulticing.

All stone cleaning procedures generally attempt to maximize cleaning power while minimizing chemical and physical attack that can result in further stone degradation. The use of inert natural clay poultices, or mud packs, is recognized as one of the safest methods for removing dirt deposits without affecting the stone’s integrity or surface detail. Poultices act to draw out hidden dirt, salts and microbes and is the least harmful of all techniques.

The principal mineral that makes up Kaolin is kaolinite which is a form of calcined aluminum silicate. It has a 2-layer sheet-type crystal structure made up of plate-like particles. Our kaolin has an extra fine particle size of 1 micrometer in diameter with a bright white color and a pH value of 5-6. What makes this kaolin superior to other kaolin powders is that it has an extremely high oil absorption rating of 105-120.


Catalog No.DescriptionPriceQuantity
CL-10015-0100Kaolin Colloidal, 1 lb.$7.20
CL-10015-0200Kaolin Colloidal, 1 kg.$13.78
CL-10015-0500Kaolin Colloidal, 5 lbs.$24.70
CL-10015-1000Kaolin Colloidal, 10 lbs.$38.45
CL-10015-2500Kaolin Colloidal, 25 lbs.$85.00
CL-10015-5000Kaolin Colloidal, 50 lbs.$149.75

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