Our engine service sealant contains deionized water, surfactants, and polymethyl methacrylate. It can have good heat resistance and flexibility, suitable for various engine maintenance. Its use method is very simple: 1. Clean the surface of the car engine; 2. Apply appropriate amount of sealant to the engine. 3. Wait 10 minutes for the surface to dry. Healthy green ingredients, no pungent smell, good repair effect.