Abstract: Particulate high-emissivity (high-?) refractory products include a mixture of (a) a particulate refractory base material which includes at least one particulate binder material, at least one particulate refractory raw material filler material and optionally at least one refractory additive; and (b) a high-? pigment in an amount sufficient to impart high-? properties to the refractory product when cured of at least 0.80. The high-? pigment is homogenously dispersed throughout the particulate refractory base material and is thereby less susceptible to loss of high-? properties over time. The particulate high-? products may be formed into an castable wet mix, an aqueous slurry or an insulating aqueous foam and cured so as to provide a component part of a high temperature refractory structure (e.g., the walls or ceiling of a refractory furnace) having high-? properties.