The non-polar structure of PP gives it a very high molecular mass. This makes it highly resistant to chemicals and to aqueous solutions of salts, acids and alkalis. PP homopolymers have a high level of stiffness and toughness at room temperature. This together with their capacity to repel water makes them a good choice for mechanical and structural applications. Advantages: Polystone P is a hard, stiff, easily workable material with excellent toughness. It is easily weldable. Ideal for tanks and fittings in the food and chemical industries.