Projiso manufactures spray-applied fireproofing and insulation coatings at its Montluçon plant — Fibrofeu, Firespray, Fibrexpan and Fireplaster, based on slag wool, plaster and vermiculite — for the passive fire protection of steel, concrete, timber and mixed structures, roof decks and ductwork. The fibrous products are CE-marked and ACERMI-certified (the ACERMI mark is operated jointly by CSTB and LNE), with fire performance backed by procès-verbaux from approved laboratories under the arrêtés of 22 March 2004 and 14 March 2011.