This 600ml ProWorx Fibrefix Premium Fibreglass Body Filler is a high-quality body filler containing short fibreglass strands, ensuring strong and long-lasting repairs of all sizes. This two-part polyester body filler is specifically designed for deep filling and is perfect for bridging holes and rust in damaged car panels. It can be used on aluminium, steel, and glass fibre, creating a permanent and waterproof seal over all repaired areas.