text: The main use of concrete is for producing absolutes. The general process of producing absolutes includes extracting the concrete with ethanol, using cold filtration to remove residue, then distilling off the ethanol. 
  Absolutes are highly concentrated and aromatic oily mixtures. They are similar to essential oils, but are more soluble and have longer lasting odours. Absolutes are completely soluble in ethanol and can be used as perfume ingredients. In contrast to this, concretes are only partially soluble in ethanol due its composition of heavier substances. Therefore, they cannot directly produce perfume without being made into an absolute first. Moreover, because of their insoluble character, they are also used in soap perfumery.