Blue Loctite is not a sealer, it's a thread locking compound. Loctite Anaerobic Sealer is most likely what Jon suggested, I've seen it suggested for sealing carb inlet threads on a few other sites as well. It does work very nicely. In addition, I would suggest dressing the area around the inlet to be flat and square with the fitting, so that you have a proper surface for the gasket to seal against. That is going to the largest part of the problem, and if it isn't addressed, you will continue to have leaks.
