I have a 2010 JK wranlger unlimited. I have a radiator leak and this is my 2nd radiator in 2 years. Would Bars stop leak tablets be a bad idea?

'IF' that actually did stop the leak it would only be a temporary repair and the leak will return! Then where will you be when that happens? Radiator should be covered under warranty - 'IF' it was a 'quality' replacement.. Further inspection by qualified personnel should reveal any other related issues that may be contributing to premature radiator failures.