Is steel seal a good head gasket repair?

The ONLY head gasket coolant additive (fix) I can most positively recomend is "blue devil" about a dozen fixed vehicles I've done. Different cases too, some wich let exhaust gases in the coolant system causing accelerated overheating as acceleration increases, and other cases where coolant gets through into combustion, causing loss of coolant and white exhaust smoke. Just make sure you follow the directions exactly as on website. I've put thousands of hard miles on head gaskets fixed with this stuff you will be surprised. I was