PARALOID EXL-3361 greatly increases toughness of polycarbonate (PC), polybutylene terephthalate (PBT), PC blends such as PC/PET, PC/PBT, glass-filled PC and glass-filled nylon. PARALOID EXL-3361 is a high performance impact modifier that provides improved color homogeneity and heat stability for dark colored formulations. PARALOID EXL-3361 significantly reduces the effect on colorability compared to standard acrylic modifiers, providing a very homogenous and equal color. It also improves heat stability during processing and end use applications. PARALOID EXL-3361 can be added at low concentrations as 4% to provide fully ductile behavior for demanding applications. Its unique chemistry maintains optimal material properties at high temperatures. PARALOID EXL-3361 is well suited for applications in the advanced materials industry that require dark colors with uniform appearance and durability under heat.