I have not blended their natural waxes....I used to use KY125 till I moved west and shipping was too high. That alone is too soft for tarts IMO. I LOVE the KY tart wax and use it for my tarts...but I am not all soy anymore. I guess you could get some samples and try it and see how it goes.....maybe vickie knows she is always helpful....she owns KY and has talked to me several times and helped me out.