go with wired wax, I have tried duragilt, not to good of returns, and plasticell, bees wouldn't even wax it up. I have some two years old and the bees won't touch it. My bees have now 2 supers on top, of three hive bodies on most, some only have two hive bodies, I have six splits from May15th, they have pulled two hive bodies now and I will be adding supers in a week, I'll catch the fall flow and we are still in the flow here now. Sumac is just kicking in.