Description: The solder mask freezes when exposed to UV rays. It is non-conductive and does not dry out in the tube, which makes it reusable. After applying the mask to the motherboard, the working time is unlimited, it will not freeze until it is exposed to UV rays. Ideal for covering breaks in the laminate, after repairing paths or covering wires at cross joints. An indispensable product in any service that deals with motherboard operations.