For applications where adhesive properties are critical, regrind should not be used. The regrind material will contain a small amount of mould release agent, which could compromise adhesive properties. Furthermore, the mechanical properties of the material will degrade some from repeated re-melting. For non-critical applications the runners can simply be thrown back into the melt reservoir without any regrinding. It is strongly recommended to confirm that components moulded from “regrind” material meet specifications.