Wooo weee, talk about a resurrect post! That was 6 years ago. Liquid rubber is the cheaper method, but I don't recommend it personally. Times have changed and epoxy is cheaper than it use to be and is much easier to seal to than rubber. It is a better product overall, from what I've seen. There are several brands depending on your price range. So take a look into that! The price difference on a 80g is negligible for the two products now days.