How Long Does It Generally Take for Automotive Putty to Deteriorate?
2 Answers
Automotive putty generally deteriorates after 3 years. Body filler, also known as auto body putty, is a two-component unsaturated polyester putty used in sheet metal work to repair dents and damages on steel panels. It is primarily used to fill deeper dents, restoring a smooth surface to the car body and ensuring that the primer adheres firmly to the surface. Body filler features non-stick sanding, a filling thickness of up to 50mm, strong adhesion, and short drying time, making it suitable for quick automotive repairs. The main components of automotive putty are unsaturated polyester resin, fillers, initiators, and plasticizers, playing a crucial role in the automotive painting process.
As a seasoned mechanic with over a decade of experience in auto repair shops, I've seen all kinds of outcomes after body filler application. There's no fixed timeline for deterioration—it varies based on materials, workmanship, and environment. With premium filler and proper techniques, if the car is parked indoors in a dry area, it can last five to ten years without issues. However, with sloppy application, inadequate surface preparation, or cracked paint allowing moisture penetration, bubbling or peeling can occur within months. In rainy regions or with frequent car washes without prompt drying, water absorption accelerates filler expansion. The key is choosing professional shops for application, ensuring thorough drying before applying multiple protective paint layers. Don’t underestimate routine maintenance—parking under shelters and avoiding puddles significantly extends lifespan. Otherwise, deterioration not only looks bad but may trigger body rust, leading to higher repair costs.
