Silicone sealant is highly durable but not necessarily permanent. It can last for many years, especially in areas where it’s not exposed to constant wear or harsh conditions. Over time, silicone sealant may degrade due to exposure to UV rays, extreme temperatures, or physical stress. However, when applied correctly in the right conditions, silicone can maintain its effectiveness for anywhere from 5 to 20 years, depending on the environment.

If you’re using silicone sealant for a project, keep in mind that while it’s water-resistant, flexible, and adheres well to many surfaces, it might need replacement if it shows signs of cracking, shrinking, or losing its seal over time.