CONCRETE TEST CYLINDER 6"X12". M.A. Industries concrete test cylinder mold is a robust mold with unlimited life and weatherproof. It is recyclable - and biodegradable - and, in addition, contains a unique additive that allows microbes in landfills and composting facilities to break down the plastic. One of their advantages is that this mold is not affected by heat, light or cement paste and is guaranteed to retain the round shape of the sample. The writable surface allows data recording. In addition to this, other concrete test cylinder mold sizes are also available.