In the past I've had consistent issues with the 464 pure soy wax. This includes sinkholes, frosting, etc that we've all experienced using pure soy.
I started to experiment with the C-6 wax and noticed it was significantly denser because of how long it took to burn. I started to add some to my 464 soy just to see what would happen and noticed that it helped stabilize some of my issues with the pure soy. I now have far fewer holes and settling issues in my candles. As an added bonus they also burn longer which, of course, my customers are happy about.