For me scalp protector actually worsens my hold time. It creates a layer of film on your head. If that film doesn't stick to your head well it will be the weak link in the bond as the glue only sticks to the film, not your head. So the film comes loose and the bond comes loose. Scalp protector is terible for me. I've even tried the new thick scalp protector from Walker and it was the same.