What is the method for automotive chassis sealing?
2 Answers
The method for automotive chassis sealing is: 1. Thoroughly clean and dry the asphalt, oil stains, and other contaminants from the car chassis; 2. Cover the engine oil pan, transmission housing, exhaust pipe, and other parts with masking paper to avoid spraying; 3. After wrapping the key areas, use a high-pressure spray gun to apply the chassis anti-rust coating evenly over the vehicle chassis, with a thickness between 1mm to 3mm; 4. Wait for 2 to 4 hours after spraying. Chassis sealing involves spraying a highly adhesive flexible rubber resin onto the chassis to isolate it from the external environment, achieving functions such as anti-corrosion, rust prevention, and sound insulation, thereby extending the vehicle's lifespan.
A while ago, I DIYed the undercoating for my beloved car. It’s actually not difficult but requires careful steps. First, thoroughly wash the car and lift it onto a jack stand. Use a metal brush and specialized rust remover to clean rust and grease from every corner of the undercarriage. After drying, carefully wrap high-temperature components like the exhaust pipe and drive shaft with masking tape, then tightly cover the tires and rims with plastic sheets. Choose a rubber-based undercoating spray, shake the can for three minutes before opening, and maintain the spray gun about 20 cm away from the undercarriage while moving evenly during application. Apply the first thin layer evenly and wait ten minutes for it to dry to the touch, then apply a second thicker layer. Key areas like the fuel tank and inner wheel arches need three to four layers for sufficient protection. Finally, wait half a day for it to fully dry before reinstalling the underbody panels. The most critical part of the whole process is ventilation and protection—wearing a mask and goggles prevents harm from chemical fumes.
