Can you put perma -flex on gasket to assure no leak?

Using Permatex or similar gasket makers can help ensure a better seal on gaskets and may prevent leaks. However, it’s important to note that these products are typically designed for specific uses, such as sealing surfaces or filling gaps, rather than as a substitute for a proper gasket. Always follow the manufacturer's recommendations for the best results, and ensure surfaces are clean and dry before application. For critical applications, it may be better to replace the gasket entirely if it's damaged.