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Penetrating primer/sealer for use on concrete substrates and Carboline Pyrocrete Fireproofing products. It performs extremely well in sealing cementitious surfaces and is designed to receive a variety of different generic types of finish coats. Some recommended uses of 1340 include the use as a curing compound or form release agent. When applied to “green” concrete it will retard the escape of moisture during the cure period. It is also excellent for use as a form release coating on plywood or steel forms.