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Use code ATLAS for 10% off your first order with us!
Use code ATLAS for 10% off your first order with us!

D/2 Biological Solution - 1 Quart (Spray Bottle)

Original price $18.95 - Original price $18.95
Original price
$18.95 - $18.95
Current price $18.95

D/2 Biological Solution - 1 Quart (Spray Bottle)

Size: 1 Quart
Reusable spray bottle

D/2 Biological Solution is a biodegradable, easy to use liquid that removes stains from mold, algae, mildew, lichens and air pollutants. It is effective on marble, granite, limestone, brownstone, travertine, masonry, terra cotta, concrete, stucco, wood, and other architectural surfaces including monuments, sculpture and headstones. A contact time of only 10 to 15 minutes followed by scrubbing with a soft nylon or natural bristle brush will loosen most biological and air pollutant staining.

D/2 Biological Solution is effective for removing harmful biological and air pollutant staining from many building materials including masonry, marble, granite, limestone, brownstone, travertine, terra cotta, concrete, stucco, wood, canvas and vinyl & aluminum siding.

Check out all the of the users of D/2!: Including The White House, The Veterans Administration, and the Congressional Cemetery. 

Safety Data Sheet     SPECS

Questions & Answers

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  • What is D/2 biological solution made of?

    The exact recipe of D/2 is proprietary information. The solution is made using quaternary ammonias, and has a basic pH.

  • What are the shipping charges for a quart of D2 biological solution to California?

    About $9-12. If you add the product to your cart and go to checkout you will be given all the shipping options and costs before paying.

  • Can this work on a slate headstone?

    Yes, the D/2 works on all stone surfaces!

  • Will this cleaning solution remove hard water on headstones?

    No, D/2 will not remove hard water staining.
    For cleaning hard water staining from granite we recommend Sparks Brick & Tile Cleaner.
    For cleaning hard water staining from marble we recommend Akemi Marble Rust Remover.

  • Will this cleaner also remove hard water build up on headstones?

    Hello! We now offer a product called CleanStone for hardwater staining on headstones. We also offer a CleanStone Kit that comes with Sparks Brick & Tile Cleaner for maximum effect.

  • Is that a Tampico or Tampafil brush used in the video for cleaning the gravestone?

    The brush used in the video is Tampico

  • Is it harmful to the grass? Or will it have any affect on the grass

    D/2 will not have long term effects on the grass. If you are planning to scrub and rinse with water, we recommend covering the surrounding grass / flowers to protect them as an extra precaution.

  • Will this work on black mold that we’re finding on some of the older headstones especially on the east coast?

    Yes, D/2 is perfect for this application! You can spray and walk away, or spray the surface and wait 10-15 minutes and scrub with a soft bristle brush. If you choose the scrub method you should rinse the stone with water when you are finished. D/2 will continue to work over time to clean the stone, so make sure you check back in 1-2 months to see the full effect!

  • How many sq inches will a quart bottle clean?

    The D/2 Biological Solution website says "Typical coverage to remove medium deposits will vary from 250 to 350 square feet per gallon."
    This means a quart will cover 62.5 to 87.5 square feet. There is a range because it depends on the porosity of the stone.

  • Is this safe to use on my brothers bronze headstone? Any suggestions are greatly appreciated. Thank you.

    D/2 is safe to use on bronze and will not harm it! The solution may not clean everything on bronze, in which case we recommend using Pre-Lim to clean and Renaissance Wax to maintain bronze plaques and headstones.

Customer Reviews

Based on 7 reviews
david choate

I highly recommend this product for gravestone cleaning.


The best bio cleaner for headstone!

Best Cleaner Out There!

This stuff is far superior to anything else on the market right now and I'm amazed how many stones I have been able to clean with just one bottle!

Rebecca Pearson
Incredible results!

I use D/2 to clean my family's and other gravestones in local cemeteries. The results speak for themselves, it's amazing! Removes decades (even centuries) of lichen and grime, and leaves stones looking good as new!

Tonya kaiser
Power in a bottle!!

Perfect little spray bottle to have handy but does so much. Super convenient to store in the trunk or a small bin, and because of its size it’s light and easy to use for anyone. And the quality….. this stuff delivers in a big way!!!