Our indoor display adopts international FR-4 layer board, double layer circuit board design. Lamp surface glue adopts sealing AB glue, display small spacing special, colloidal soft, good resilience, good compatibility to metal and most plastics, high temperature no cracking, low temperature no oil leakage process. The glue on the back is a single group of volatile nano-transparent adhesive coated with polymer material. After curing, it is an elastic rubber layer with certain toughness and strength. The service life is more than 5 years.