Roughing a material 
is achieved with a sanding or brushing process. For example, EVA midsoles are roughed before assembly to help break the smooth surface for better adhesion of the shoe cementbond.
During a cementing operation both surfaces to be bonded will be primed before the cement is applied. Between each application the shoe parts pass through a heat tunnel to quickly dry the primer. The Primer must be matched to the material type. Rubber, EVA and leather each require a different primer.

 ">primer and cement.

---