The Soxhlet Assay (DNIT 158/2011-ME) aims to determine the binder content in an asphalt mixture. During the test, a suitable solvent is used in the reflux and condensation process, without contamination of the sample, and with precision in the results, as the sample is contained within a filter paper and there are no losses. Stratura Asfaltos is a pioneer company in high-performance asphalt mixture technology and provides the Soxhlet Equipment, important for consultants and field engineers to monitor asphalt contents during the execution of a work.