Hi, I recently acquired an old Transco from a sign shop. It is a 15/30 that is at least 15 years old, and I recently went to un-pot it. Upon removing the lid, I had a startling discovery: no tar. Instead there was this stuff that looked and fealt like cement. It also had a sweet odor, like beeswax. Do any of you have an idea about what this stuff is? Thanks, Jason Raycroft