Ettringite is a calcium aluminum sulfate mineral that forms in alkaline conditions through chemical reactions between aluminum, calcium, and sulfate. It has a stable hexagonal crystal structure and very low solubility. ECO-PERLA paint is made from a synthetic ettringite and provides extreme whiteness, opacity, adhesion, and environmental friendliness for uses like walls, paper, and adhesives. It contains no irritants, preservatives, or volatile organic compounds.