SYNTEVEN 358-1 is an orthophthalic unsaturated polyester resin dissolved in styrene. It is pre-accelerated and thixotropic, with medium viscosity and reactivity, and contains a color change indicator additive.This resin is designed for general-purpose use in manual or cutting and spraying lamination processes. It is particularly suitable for the construction of boats and other composite products, including glass fiber reinforced plastic hulls. RINA APPROVED.