Covia Holdings Corp, formerly Unimin Corp, is a provider of minerals and material solutions for the industrial and energy markets. The Company provides diversified mineral solutions to the glass, ceramics, coatings, polymers, construction, water filtration, sports and recreation markets. The Company also offers a range of products, including high-purity silica sand, nepheline syenite, feldspar, clay, kaolin, lime, resin systems and coated materials. The Company offers a selection of proppant solutions, additives, and coated products. Its proppants solution includes proppants, proppant transport technology, diverting agents and activators. Its sand and resin solutions include high-purity sand, such as wedron silica, lake sand and subangular silica sand and gravel; TechniSand resin-coated sand, which includes TechniSand TruCoat resin-coated sand and Technisand Signature sand; and resin systems. It offers various types of sand products for sports and recreation activities.