Is Permatex acceptable for sealing freeze plugs?

Yes, Permatex can be acceptable for sealing freeze plugs, particularly products designed for high-temperature and high-pressure applications. It's important to choose a specific formulation, like a high-tack sealant or liquid gasket, that can withstand automotive conditions. However, always ensure the surface is clean and follow the manufacturer's instructions for best results. For critical applications, consult your vehicle’s service manual or a professional mechanic.