Structo-Lite® Basecoat Plaster is applied by hand or machine methods, on gypsum or metal lath, clay tile, concrete or cinder blocks and other approved plaster bases to provide a lightweight, high-thermal-conductivity conventional plaster application. Mill-mixed perlite-aggregate gypsum plaster provides a plastic working material for walls and ceilingsAggregate-free formulation saves time and laborLightweight plaster is quick and easy to applyStrong insulation properties provide K factor of 1.74, three times the insulation value of sanded plaster