Its kinda nasty but 30% ammonia and 70% alcohol. Denatured or isopropal. You can actually see the oil breaking down when you spray it on. I dont know why but it seems to work awesome. My brother and I actually used that combo for another application too. We had the aleron of his funtana get warped so we uncovered it clamped it straight and sprayed it for 3 nights with that solution let dry for 2 more and done. It straightened out the wood perfectly.