Head gasket sealer, also known as engine block sealer, reinforces or acts as a substitute for the gasket that sits between the cylinder head and engine block of an automobile.
That gasket has an important job. It maintains the crucial compression in a car's engine and also protects against coolant and oil leaks that can destroy the cylinders. However, it’s a part that gets little thought as part of typical automotive repairs—until there’s an issue.
