Based on this product's specifications, here are some alternatives and similar models
INTER-TROTON FIBERGLASS Polyester Putty
Summary description:
INTER-TROTON FIBERGLASS is a high-quality two-component polyester putty reinforced with glass fibers. Designed for automotive body repair, it provides excellent mechanical strength and high filling properties. Ideal for bridging gaps, reinforcing corroded areas, and repairing structural damage on metal surfaces. Easy to apply and sand, it ensures a durable foundation for further finishing layers in professional car bodywork.