This is a dry and blank sheet of paper. This is a primitive hand-made fishbowl made of ceramic tile and bonded with Kastar Ceramic Tile Sealer. Now let’s put The fish and water into the bowl at the same time. After 24 hours, we can see that the fish is still full of vitality which proofs that Kastar is absolutely non-toxic and safe. Now let’s remove the fishbowl, the paper is still dry, which tells that Kastar waterproofing effect is first-class.