Epoxy prepreg SF 75-90

low-temperature curing

¬ Easy to sand, improved surface for painting ¬ Effective print-through barrier ¬ Reduction in surface film-laminate interfacial voids ¬ Stable surface up to 115°C (239°F) ¬ Protects underlying laminate The SF75-90 surfacing material is a grey filled, sand-able epoxy film designed to enhance the surface finish of moulded composite components. It allows a paintable surface finish to be obtained by vacuum-bag moulding processes. It can be used directly against a suitably release treated mould surface, with prepreg or SPRINT™ plies laid up behind it. When fully cured with SPRINT™ or prepreg, SF 75-90 forms a stable sand-able surface which, once lightly sanded to provide a key for painting, reduces print-through of the underlying laminate. The epoxy system is supplied ready impregnated into a supporting medium and ready catalysed, requiring only a low to moderate temperature cure.