[UncleBob]

I'm trying to visualize the type of hose clamp you're discribing, and I'm drawing a blank. Not sure what type it is, but I've yet to see a hose clamp that was a worm-gear type that required anything special when tightening it.

If you paid a shop to do coolant work and you now have a leak, I think its quite reasonable to take it back to them and have them recheck their work, and who knows, there might be a new/different leak, but they could probably very quickly find the problem and fix it.

and don't add sealants to hoses. If you have a leak, there's a reason. Fix the cause of the leak, not the symptom.