What is Perfume Base? Purenso Perfume Base is a dilutant that dilutes both essential and fragrance oils. It’s designed for perfume making as well as room/linen sprays. Made with a combination of alcohol, fixatives and dipropylene glycol, this skin-friendly dilutant is the perfect perfume mixer. Why use Perfume Base for making perfumes? We love this Perfumer Base as it has been formulated specifically with crafters in mind! It is great for making high quality perfume blends as the only thing you need to do is add your favourite scent!