
There are four types of car chassis armor, namely: 1. Asphalt-based chassis anti-rust glue; 2. Oil-based solvent chassis anti-rust glue; 3. Water-soluble chassis anti-rust glue; 4. Composite polymer resin paint. Car chassis armor is a high-tech adhesive rubber asphalt coating used for anti-collision, anti-rust, and sound insulation of the car chassis. The functional characteristics of car chassis armor are: 1. Chassis anti-corrosion; 2. Preventing stone impacts on the bottom plate during driving; 3. Eliminating resonance generated by the engine, wheels, and bottom plate, providing shock absorption; 4. Reducing noise generated between the vehicle and the ground during driving; 5. Preventing underbody scraping and reducing the degree of damage to the chassis.

There are quite a few types of automotive undercoating. After driving for over a decade, I've found the main ones to be asphalt, rubber, water-based, and polyurea. Asphalt coating is the most common - inexpensive and quick to install with decent rustproofing, though it may soften in summer heat and has a strong odor making it less eco-friendly. Rubber-based coatings incorporate elastic materials, providing exceptional noise reduction especially noticeable during highway driving for a quieter, more comfortable ride with comprehensive protection. Water-based undercoating uses water as its base - non-toxic, fast-drying, and environmentally friendly, making it the top health-conscious choice for family vehicles. Polyurea is the premium option - extremely impact-resistant with over a decade of durability, though significantly more expensive, ideal for off-roading or challenging terrain. Beyond these, some hybrid or specialized rustproof coatings exist. When selecting, consider your vehicle's usage: opt for economical options for city commuting, choose high-pressure-resistant coatings for rural rough roads, and maintain the coating regularly to preserve integrity and save on repair costs - practical and durable.

Chassis armor varies in effectiveness depending on the material. From a material perspective, it is generally divided into four major categories: asphalt, rubber, water-based, and polyurea. Asphalt coatings, made from petroleum by-products, are thick and inexpensive, providing basic rust protection. However, they are prone to cracking in large temperature variations and emit harmful volatiles, making them less eco-friendly. Rubber types blend natural and synthetic materials, offering flexibility, wear resistance, vibration absorption, and noise reduction, resulting in quieter driving and more meticulous body protection, with better environmental performance. Water-based coatings are trendy, using non-toxic water solvents, quick to apply, and prioritize environmental safety, making them popular now. Polyurea coatings are high-tech polymers, extremely tough, impact-resistant, slow to age, and offer long-lasting full protection, but they are expensive. Each type caters to specific needs: choose asphalt for wet, coastal areas to prevent salt corrosion; for urban daily use, opt for standard types; for noisy roads, select soundproofing materials. Avoid choosing the wrong material to prevent wasted effects. Proper maintenance can extend the lifespan of the undercarriage.

I've been into DIY undercoating for a few years and tried several types. The spray-on asphalt coating is the easiest for DIY—cheap and basic rust protection, but it has a smell during application and the coating might be uneven. Rubber-based types require professional tools, offer strong elasticity and good sound insulation, but installation is more complicated. Water-based undercoating is eco-friendly, non-toxic, dries quickly, and is beginner-friendly—highly recommended to try. Polyurea needs professional installation, is impact-resistant and long-lasting, but expensive. Choose the type based on usage: economical for city roads, high-pressure-resistant for off-roading. Before application, clean and dry the chassis, then spray for strong adhesion. Regular car washes and checks for cracks make maintenance simple and durability strong.

From an environmental and health perspective, water-based undercoating is the safest among chassis armor types. Traditional asphalt contains chemical solvents that release harmful volatiles, posing long-term respiratory risks, especially in the confined space of a car. Rubber-based coatings have improved in environmental friendliness, but material quality varies. Water-based coatings are completely water-soluble, non-toxic, and odorless—leaving no smell after drying. They protect both the vehicle and your family's health. Polyurea is also eco-friendly due to its durability, reducing replacement frequency. When choosing, look for environmental certifications and avoid cheap, inferior products. Quality undercoating not only prevents rust and reduces noise but also improves in-car air quality, ensuring long-term peace of mind without health hazards. The overall value is high, making driving more comfortable.


