Semstone 884 is a vinyl ester polymer concrete which incorporates proprietary non-shrink technology into its formulation, making it the first practical vinyl ester polymer concrete for use as a concrete topping. It is recommended for use in concentrated nitric acid service and other strong oxidizers. Semstone 884 is an excellent alternative to acid brick. It is also used as a construction material for pouring pump foundations and small tank foundations. It can be used for pre-casting of sumps and trenches.