The laser equipment can be very hazardous. The high voltages present in the laser power supply and the laser cavity are lethal. Only trained personnel should be allowed to repair the laser equipment. The laser light can cause permanent damage to the eye - the collimated nature of the laser light allows for focusing of the light on the retina in the eye. Direct laser light or scattered laser light allowed to enter the eye can cause partial to total permanent blindness. A laser safety program should be initiated and laser safety training should be given to all individuals before using any laser welding system.

• No undercut/sink of the weld or base metal surrounding the welded area when proper techniques have been used.
• Minimal heat input to the mold base metal resulting in no or the lowest possible distortion to precision features in close proximity to the weld repair area.
• Minimal weld metal deposited resulting in minimal machining to restore the part to its original dimensions.
• Hard, tough resultant weld metal attributable to the fine grain structure of the weld metal, which is a result of the extremely rapid solidification of the laser weld.
• Extremely precise control of the weld metal location, which allows for welding within a few thousands of an inch of features that are not to be disturbed on the mold.
• Little to no discoloration of the weld and the surrounding base material.