D/2
Biological Solution™
No Other Solution
Is more Trusted by conservators
D/2 Biological Solution is effective for removing harmful biological and air pollutant staining from building materials including masonry, marble, granite, limestone, brownstone, travertine, terra cotta, concrete, stucco, wood, canvas and vinyl & aluminum siding.
National Parks Study Recommends D/2 for Government Headstone Cleaning
Researchers studied five different cleaners on stones located in five different climates at locations across the United States. Microbiologists at Harvard University evaluated samples for regrowth of microorganisms including bacteria, fungi, and algae. D/2's quaternary ammonium solution came out on top!
Download the Comparative Study
Read more from the NCPTT
D/2 Biological Solution becomes part of a Presidential Executive Order
The National Cemetery Administration now uses D/2.
"The NCA entered into an agreement with the National Center for Preservation Technology and Training, NPS, to evaluate marble cleaners in an effort to minimize damage to historic headstones. The 3-phase study began in 2004 and was completed in 2011. The best - practice recommendations resulted in NCA's determination to use the preferred cleaner, D/2 Biological Solution…" (Page 3)
From Presidential Executive Order 13287, Preserve America FY 2011 Triennial Report Department of Veteran Affairs.
Click here for the full report.
(Photo: Matt H. Wade - CC BY-SA 3.0, Edited by D/2 - CC BY-SA 3.0)
Tim Shea Cleans Orphans’ Headstones With D/2
We were pleased to see a wonderful article recently in the Owatonna People’s Press about Tim Shea, a lone volunteer who’s cleaning the headstones of the Minnesota State Public School Orphanage Museum, with a bottle of D/2 by his side. Click here to learn more about Tim and other Success Stories.
(Photo: Josh LaFollette - southernminn.com)
D/2 Biological Solution donated for Huge Grave Cleaning Event at Vicksburg National Cemetery
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 fantastic volunteers undertook a cleaning of the 18,000 veterans' headstones at Vicksburg National Cemetery.
D/2 at Work on Wright House Wood
In 1939 journalist Loren Pope and his wife Charlotte Pope commissioned Frank Lloyd Wright to design a new home. The design followed Wright's Usonian principles and was completed in 1941. The Pope-Leighey House "Usonian" house was developed by Wright as a means of providing affordable housing for people of moderate means. Many innovative concepts, including spacious interiors, corner windows, and a cantilevered roof, began here and were quickly adapted across America.
The Pope-Leighey House is owned and operated by the National Trust for Historic Preservation. In 1965, the house was relocated to the grounds of Woodlawn Plantation (another Trust site), removing it from the path of a highway project. Located just outside Washington, D.C., the Pope-Leighey House and Woodlawn Plantation share a 126 acre estate that was originally part of George Washington's Mount Vernon.
For more on the Pope-Leighey House, visit savingplaces.org
(Photo: Cliff - CC BY 2.0, Edited by D/2 - CC BY-SA 3.0)
