Testing Liquid Rubber on a Cardboard Box

Well, the test is complete and I have to say that I'm impressed overall.  After six days in a greenhouse, where the water was getting to a point of almost boiling, it held up!  With zero water damage visible on the outside of the box and zero signs of any leakage on the table I’m willing to say that Liquid Rubber is quite effective as a waterproof coating!

The box itself did better with the overall pressure from the water weight than I expected as well, due I suspect in no small part to the strength of the Liquid Rubber coating.  The product will take on the color of the uncured product when it remains wet for long periods but there are coatings to deal with that.

The only down sides that I could see were a high pH level in the water, which is easy enough to deal with, and when it is in hot wet water, the product can be moved with firm enough pressure.  Since the average aquaponic fish tank should never get as hot as the water was in the box, I don't imagine this will be an issue for most aquaponic gardeners.

Based on the results so far, I have decided to build a 2ft x 3ft x 12 inch mini fish tank for the floating aquaponic garden.  The tank will be shaded most of the time so warming up the Liquid Rubber shouldn’t be a problem.  Don't worry, I'm not building it from a cardboard box … that was just an early stage test.  I'm excited to begin on this next stage of testing and will let you all know how it works out!