hello! looking for leak proof clearo or tank!
...And I'm hoping to start a nuclear reaction that occurs at room temperature!
Seriously though, there really isn't any such thing. All clearos leak to some extent, some are more prone to it than others. Usually serious leaking is due to a faulty product, or user error. Some things to do...Make sure the gaskets are all in place and that they are in good shape. Do not over fill. Do not remove wicks/invert gaskets/remove gaskets etc. (Note: I sometimes do these things, but I fully understand that by doing so, I am altering the original design of the device, and any problems with it are my own doing)
With those items in mind, I have found the Iclear 30s, and top coil clearos in general to be more trouble free as far as leakage goes than bottom feeders. Most leaking problems I have had with bottom coil clearos is due to the coil not being tight enough, or the wicks being out of place or just worn out.