How Long Can Auto Body Filler Last?
2 Answers
How long auto body filler can last depends on the craftsmanship of the application process. Generally, it can last for 2 to 3 years. Here are some precautions regarding auto body filler application: 1. After applying auto body filler, you need to wait 1 to 3 days before painting. Whether it's ready for painting depends on the dryness of the filler. If painting is done before the filler is completely dry, peeling may occur later. 2. Additionally, applying filler in humid weather will definitely prolong the drying time of the filler and may even affect its adhesion. Therefore, before applying filler, be sure to check the weather forecast for the coming days.
Last time I used body filler to repair my car myself, it lasted about three years before showing some cracks. I think how long body filler lasts mainly depends on how you use it. If it's on areas like doors or bumpers where there's less vibration during daily driving, it can hold up okay. But for places like wheel arches that take a lot of bumps, you might need to redo it in a year or two. The key is careful application—the mixing ratio of the filler must be precise. Too thick and it's prone to cracking; too thin and it won't fill properly. I usually use well-known brand products, sand it thoroughly smooth after application, and then paint over it, which helps the protective layer last longer. If you work on rainy or humid days, the drying process is slower and the results are worse, so I recommend choosing dry weather for the job. Generally speaking, with good quality materials, it can last five to seven years. If you go cheap and cut corners, it might fail in less than six months. Daily care like avoiding scratches and prolonged sun exposure can help, but don't expect it to last forever—it's just a temporary repair material after all.
