Vermiculite is recognized as a material particularly suited for fire protection. Because of its low density and good insulation properties exfoliated vermiculite is used in building boards. These boards are often used as a ‘core’ in fire doors, to build fire barriers, to encase or construct ductwork and to protect steel building elements from the effects of fire. Vermiculite-based products range from factory made boards and panels to premixed coatings suitable for application by mechanical spray or by hand plastering techniques. Vermiculite concentrate is also used in the production of fire resistant gypsum plasterboard (drywall or wallboard).