Straight parafin? I don't know, I buy it at a store. The name brand is called Crafty Candles. It doesn't say preblended or if you need to add additives or anything. I have tried different formulas with it to see if I could find one that works. I don't recall the formulas. I do know that I used universal additive, vybar 103, nd stearic acid. Not all together, I know. I used them all alone, and then I know that I used the vybar and the stearic acid together in one, but I don't remember how much I used of them, because none of them seemed to work. Hope