The 32 fl oz K&W FiberLock Head Gasket & Block Repair works to repair a variety of problems on your vehicle. You can use it on cars, trucks and buses. It is designed to repair cooling systems leaks. You can use it to fix head gasket, intake gasket, engine blocks, cylinder heads, freeze plugs, heater cores and coolant leaks. The Cool-X Conditioner technology, as well as military strength fibers and nanotechnology, make it a unique solution for your car maintenance. This head gasket sealant is compatible with most types of antifreeze.