D/2 Biological Solution - Stone Cleaner, Masonry, Gravestone, Headstone Cleaner as used on The White House - 0.946 Litres (1 US Quart)

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Disclaimer: Please note that the Cleaning Kit and mechanical cleaning methods are not recommended for fragile gravestones. However for less aggressive biological staining, or if you're re-cleaning stones that were recently cleaned you can dilute up to 50% water.

So we stopped with about 90% of the marble statuary to go Your wonderful article, I hope, will reassure her!It is effective on marble, granite, limestone, brownstone, travertine, masonry, terra cotta, concrete, stucco, wood, and other architectural surfaces including monuments, sculpture and headstones. Halo does not contain any acids or damaging alkalines such as sodium hydroxide which are not recommended for gravestone cleaning. After that first pass, go back over it for a second coat (starting at the top again), taking care to really wet it down (but don’t let it drip).

It is also good to note a bit of common sense philosophy by not trying to possibly compare what you as a human may be able to ingest vs what the grave marker may be able to ingest. The sixth recommendation is most likely one of a precautionary nature due to possible legality issues between a governmental agency and a manufacturer.Jefferson Market Library Posted in: Museums - The Jefferson Market Branch of the New York Public Library was designed by Frederick Clark Withers and Calvert Vaux and completed in 1877. To prevent such releases into the atmosphere, growers use various tractor-drawn knives and shanks to place it at least 10 to 20 cm (4 to 8 inches) below the soil surface.

Scrubbing isn’t always the best cleaning method, and some people are unable to put in the physical work for various reasons.The same holds true for pH values above 7, each of which is ten times more alkaline (another way to say basic) than the next lower whole value.

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.Please always read the labels, warnings, and directions provided with the product before using or consuming a product.