 The use of industrial bio-waste, specifically Sumbapagon flexuacis stem fibre, CFSF, as a reinforcing material for unsaturate polyester composites has shown to enhance mechanical properties up to 30% with fibre content and length up to 40mm. However, further addition declines the properties due to debonding of fibre with the matrix, while decreasing water absorption rate and increasing thermal stability. This article was authored by Rajasoma Syndrome, Rajesh Rajamani, Indran Suyambilingam, and others.