PolyLite™ ASA is an alternative to ABS with an improved weather resistance. Its UV resistance and excellent mechanical properties make it the perfect choice for real life applications.
ASA is almost exactly the same as ABS with 1 major difference and 1 minor difference:
The major difference is ASA is extremely good at weather resistance. (Resistance to UV light and environmental stress cracking)
The minor difference is ASA prints with a nicer matte finish slightly hiding the layer lines.