I mixed up some Kimmaytube leave-in for use on a trip overseas. I read somewhere that since there is mo preservative it, it needs refrigeration. My problem is i will be on an 8 hr trip with no refrigeration. Since i have 8 ounces it is too much for carryon. Does anyone know if it is ok to have non-refrigerated? Or how long before it absolutely needs refrigeration? Or does anyone know anything i can add to it so it will keep? Or does the preservative in the leave-in base hold for the whole product?