Industrial sand of the highest quality Extraction of the raw sand Our washed raw sand The washing and separating process Our processing plant in Langen with a wheel loader Drying and sieving in our facility in Kelsterbach Skip navigation Home page Companies Products Downloads Contact Welcome to the industrial sand plant Robert Hardt GmbH & Co. KG We are pleased that you are visiting us on our website. Here you can get an idea of us and our products . These are used in the following areas, among others: construction chemistry, construction industry, sports / golf course construction, foundry industry, ceramic industry, corrosion protection, transport industry, water management, gardening and landscaping, playground construction, swimming pool filters, fluidized bed ovens. You can purchase our high-quality sand directly from us, both as a business customer and as a private customer. If you have any questions or need information, please contact us , we will be happy to help. Companies Our company, which has existed since 1978, is located in Kelsterbach, in the center of the Rhine-Main area. All of our shareholders can draw on a wealth of experience in sand processing and refinement for over half a century. ... Further information Products Our products are high quality natural sands with standardized chemical and physical characteristics. If you have any questions, please do not hesitate to contact us by phone or in person. ... Further information Contact Do you have any questions about our different types of quartz sand or their areas of application? We are always happy to assist you personally on site, by phone or by e-mail with advice and action. You are also welcome to use our online form in advance to contact us. ... Further information Industrial sandworks Robert Hardt GmbH & Co KG? Langer Kornweg 28 | 65451 Kelsterbach | Tel .: +49 (0) 6107 - 20 60 Contact | Imprint | Conditions