Cel-Span 388FG is a transition purge that contains several proprietary additives that are essential in the cleansing cycles of lower melting point resins. it also contains fiberglass for additional barrel scouring. Cel-Span 388FG can be used directly, without any mixing to clean most plastic equipment during color and resin changes. It is recommended for use with PE, PP, PS, TPU, and ABS. Temperatures above 500 F may cause the material to smoke.