Head gasket sealants do work for vehicles, but the effectiveness of the sealant depends on the severity of the damage that it has to seal. Head gasket sealers are great for head gaskets that have minor leaks and work as pour and go solutions for these leaks. However, in situations where head gasket block repairs have to be done, for example, these sealants will not remedy the issues very well. To use a head gasket sealer in your vehicle’s engine, you first need to identify which sealant you want to use in the engine. Most head gasket sealers are placed into the radiators of engines and move around the cooling systems of the vehicles when the engines are turned on and warmed up. While the sealant will certainly work for the engine of your vehicle, it will most likely work as a temporary solution, depending on which head gasket sealer you choose.