lamp condensation is water vapor into the interior of the lamp, due to changes in conditions of condensation into water droplets. It will not only affect the aesthetics of the car lights, affect the driver’s line of sight, but also may cause damage to the electronic components of the car lights.

Therefore, if you want to remove condensation, you must first understand how water enters the lights.

lights are mainly divided into 2 types:

1. through the plastic for water transfer, the mechanism is adsorption, penetration.

2. Water transfer through waterproof and breathable products, the mechanism is convection and diffusion., because the car lights inevitably use plastic as the shell, and the car lights cannot be completely sealed without the use of waterproof and breathable products (due to the air pressure difference between the inside and outside of the car lights, complete sealing will cause the sealing material to deform and fail), so moisture enters Car lights are inevitable. But figuring out the source and transfer mechanism of these water can still effectively manage water vapor., to some extent, plastic and sponge will absorb moisture in the air, the water molecules “gathered” on the surface of the plastic shell of the lamp, then the water molecules will be adsorbed into the plastic, when the temperature changes, the water molecules will be released into the lights.due to the moisture permeability of plastic, the water molecules in the air will enter from one end through the plastic material from the outside of the car lights, and then out from the other end.When the car is running, or the engine is running, the lights are turned on to generate heat, etc., there will be a pressure difference. If the waterproof and breathable product selected is an open breathable solution (such as a breathable pipe or a relatively transparent breathable cap), the water will It will circulate to the outside of the shell through at least 2 vent holes.of whether the car is started or stalled, moving or stationary, water vapor diffusion occurs at all times, moving from high concentration area to low concentration area to tend to balance. Air moisture content/concentration gradient, waterproof and breathable product performance characteristics, waterproof and breathable product geometry and installation geometry will affect the rate of diffusion.Guangdong Shangda SDA’s waterproof and breathable products have quantifiable methods to manage and minimize the moisture content in the outer lamp housing of the car lamp.Guangdong Shangda SDA waterproof and breathable products automotive lighting solutions can effectively prevent rain, hail, snow, dust, dirt and debris from entering, and can quickly respond to pressure differences that may cause sealing failures.can quickly balance the pressure difference under overpressure conditions, thereby preventing water, pollutants, dust, and condensation from entering the shell and electronic components, ensuring the high definition of the lens of the precision LED car headlights, waterproof ventilation valve and The waterproof breathable membrane product effectively solves the infiltration of condensation and dust in the car lamp shell.