303 Welding Line Polyester Putty Ingredients: Unsaturated polyesters resins, modified resin, color pigment, stuffing, anti sediment materials, auxiliary agent and firming agent mixing ratio 100:2. Characteristics: Good scratching performance, excellent resistance to temperature changing, outstanding adhesive force and elasticity. Resistance to some certain of baking. With the properties of crack prevention and constriction deduction etc., the product is mainly applicable to repairing the holes, corrosion and welding line on surfaces of car.