Smoke has no water in my oil?

Hi, I previously asked about my car blowing smoke, well It has no water in my oil no stuff on my oil cap and it's not getting hot. So I put some ring sealer in it. Well it didn't help. Also the smoke is white and has a smell. So I was going to put head gasket sealer in it. I've got no choice I have to have my car. Can you recommend a brand or which I should get and not to expensive.? I was thinking BARS leak head gasket sealer Fixit kind. Any suggestions? Thank you