clamp

Looking for some info- I've noticed small amounts of water leaking and making a weird sound at idle around some of the clamps. Just used permatex exhaust and muffler sealant 80335 and still see a drop forming at one of the front side clamps of the H pipe. Is welding my only option? Also, say...

I have an H pipe resonator delete and axlebacks. I've tightened the clamps on the rear end of the H pipe two different times where the h pipe meets the stock piping before reaching the muffler piping and it seems it keeps coming loose and one side will turn slightly and droop down. What did...