WD stands for Water displacement. The original purpose of this spray was to displace water from metal parts before assembling to prevent rust. However, it is less recommended. WD-40 is the light-duty lubricant that is preferred for cleaning the tracks of an automatic garage door. But as rollers possess heavy workload, a lubricant that is more durable than WD like silicone spray or motor oil is required to keep it operating quietly and smoothly. Hence, try to avoid WD.