How to Apply Chassis Armor to a Car?
3 Answers
Methods for applying chassis armor to a car: 1. Park the vehicle on the car lift at the construction site, secure the support points, and after lifting the vehicle, clean the car chassis thoroughly, especially the corners. Pay attention to the dirt on the wheel arches, fenders, and fender liners during cleaning. 2. After the chassis is cleaned, prepare for the chassis armor application by covering the car's wheels to avoid spraying the coating on the rims during the process. 3. Check if the spray gun has sufficient air pressure. If it cannot guarantee enough pressure, you can first spray the vehicle's fenders. Shake the container thoroughly before use to prevent poor results. About 20 to 30 minutes after spraying, lightly touch the chassis armor with your hand. If the surface is dry, the car can be driven. The scientific name for car chassis armor is car chassis anti-collision, anti-rust, and soundproofing coating. It is a high-tech adhesive rubber asphalt coating that is non-toxic, has high coverage, and strong adhesion. It can be sprayed on exposed parts of the vehicle such as the chassis, rims, fuel tank, and lower body panels.
I've done car undercoating many times and enjoy DIY to save money and hassle. First, drive the car to a repair shop or use a lift to raise it for easy access to the underside. Then thoroughly clean the chassis, using a pressure washer to remove dirt and grease, followed by a wire brush or sandpaper to remove rust and smooth the surface. The surface must be absolutely clean and dry, or the coating won't adhere. Next, protect critical areas like the exhaust pipe, brake system, and suspension components by covering them with plastic sheets or tape. Purchase undercoating spray from a reputable brand known for strong anti-corrosion properties, and apply it evenly to the chassis surface. Maintain a distance of 15-20 cm and spray two coats back and forth like painting, waiting 10 minutes between coats for drying. After spraying, let it cure completely in a ventilated garage for at least 8 hours. The process is simple but requires patience. Once done, the chassis will have excellent rust protection, resisting rain and salt corrosion, while also reducing road noise—ideal for those who frequently drive on bumpy city roads or coastal areas. Overall, spending a few hundred yuan on materials can significantly extend your car's chassis lifespan, making it both cost-effective and safe.
In this industry for over a decade, the core of undercoating lies in meticulous preparation. Cleaning must be thorough—start with a steam cleaner or pressure washer to remove dirt, then treat rust spots with rust remover, let dry, and lightly sand with sandpaper. When spraying, use a professional spray gun or aerosol can, maintaining a 15 cm distance from the chassis and moving at a steady pace to cover all areas without misses. Avoid the exhaust pipe, catalytic converter, and wire harnesses to prevent fire hazards. After two coats, let it cure for 24 hours. I recommend impact-resistant resin-based sprays for better scratch protection. If DIY, buy enough to avoid running out mid-job; after completion, check for even coverage and touch up any missed spots. Undercoating offers strong protection against stone chips and reduces noise, especially ideal for northern snowy areas with salted roads. Beginners should watch tutorials and take it slow—simple tools suffice. Key priority: safety first—work in a ventilated area with masks and gloves.
