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  1. D/2

    On April 23, 2022, D/2 Biological Solution, along with the National Park Service, National Center for Preservation Technology and Training, the Friends of Vicksburg, and an enormous crew of …

  2. Use D/2 — D/2

    D/2 is a nearly pH-neutral quaternary ammonium solution with surfactants that help carry surface contaminants away. No other solution is more trusted by architectural and monument …

  3. About — D/2

    Our product has been specially formulated without these harmful agents. D/2 is a nearly pH-neutral quaternary ammonium solution with surfactants that help carry surface contaminants …

  4. Buy D/2 — D/2 - d2bio.com

    D/2 is sold exclusively through our network of distributors. As a premium product, D/2 is not available on big-box store shelves. Listed below are our distributors with their locations; …

  5. Success Stories — D/2

    A one-man cleaning crew, Tim Shea took it upon himself to clean the lichen-covered headstones at the Minnesota State Public School Orphanage Museum, with a bottle of D/2 by his side.

  6. Contact — D/2

    D/2 Biological Solutions, Inc. Ted Kinnari, President PO Box 3746 Westport, MA Phone (917) 693-7441 Email [email protected]

  7. Projects — D/2

    The National Park Service began cleaning the walls with D/2 Biological Solution more than 8 years ago. The current project includes two distinct sections of the wall known as the Santa …