Hi, I'm replacing a sink. The old p-trap had a ton of gunk on the inside of it, so I'm replacing that at the same time. However, I don't know what is supposed to be used to seal the connections between the pvc p-trap and the waste line. The old trap had an orange-looking material on it. I'm only familiar with pvc cement, but I know that's not what's used in this case! The next person might just want to disconnect the plumbing himself. 
Any idea what this "sealer" is called? Thanks!
Any idea what this "sealer" is called? Thanks!