PRIMA products are manufactured by Saint-Gobain, in accordance with AS/NZS 2908.2. The manufacturing process combines Portland cement, water, finely ground sand, softwood cellulose fibre pulp and additives which are then cured under under high-pressure steam in an autoclave to form a dimensionally stable fibre cement panel.
When used as a tile underlay it may be installed over a substrate of plywood, timber, particleboard or waterproof membrane with screed.