SymaLITE is an intelligent composite light-weight material on the basis of polypropylene and specially orientated glass fibres whose weight, rigidity and shaping set new standards. During further-processing, SymaLITE, after heating, can be expanded to many times its original thickness. Densities of only 0.3 g/cm³ can be achieved. Partially compacted, i.e. light-weight, components with high rigidity and sound-proofing effect, can be produced by compression molding.