I was very excited to use deep pour for a grinder mold. I measured the the parts in separate graduated medicine cups and then combined into a learner graduated container. I was quite pleased at how crystal clear my design was after removing a few bubbles. Yet 12 hours later, it is unchanged. Just for reference, I mixed a second batch the same way and those pours are still just as “wet” as they were when I poured them. My craft room sits at about 73 degrees. Very little moisture (Arizona). I’m so confused. Not even sure what to do about it if it doesn’t harden.