Composites, also known as fiber-reinforced plastics (FRP), have found a niche in the aerospace, automotive, and sporting equipment industries. More recent developments show they have promise for use as structural materials, including reinforcement for concrete.
FRP form ties offer definite advantages for many specific formwork problems, particularly in insulated walls or where corrodible metal is not permitted in the completed structure. They can be readily cut for structures that call for a large number of tie lengths, and they leave no holes to be patched. However, they usually require special hardware and some worker protection during installation.
Because glass-fiber-reinforced-plastic ties are relatively new, read the manufacturer's claims and supporting information carefully. Follow manufacturer recommendations and check for test data that support the load ratings and verify watertightness of the ties you are considering. When properly selected and installed, FRP ties should give good results.