Green-Kleen utilizes oxygen and ultra pure water to create a powerful cleaner for multiple surface types; leaves no residue to interfere with protective coatings; application is most effective when used with heated, deionized water.


Green-Kleen is a concentrated, environmentally friendly, biodegradable, multi-surface cleaner that utilizes oxygen and ultra pure water to provide the next generation in cleaning technology. This product is specially designed for glass, metal and stone surfaces treated with silicone sealers and protective treatments. Application is extremely effective when used with heated, deionized water. This product is designed for high-performance building restoration and preservation applications.


  • Environmentally friendly
  • Attacks stains caused by green algae and mold
  • Evaporates completely
  • Safe for indoor and outdoor use
  • Leaves no stain-forming residue
  • No odor
  • Made with pure water
  • Aggressive stain-fighting capabilities
  • Concentrated formula is user-friendly
  • Contains no phosphates, petroleum distillates or solvents
  • Undiluted product is non-flammable and non-combustible
  • Diluted solutions are non-toxic to aquatic life
  • Solution doesn’t contribute to smog formations or poor indoor air quality
  • Easy to us

Intended Surfaces 

This product is formulated for use stone, metal, glass and painted surfaces.


We recommend the use of one of Presto's stone protective treatments to protect the newly restored surface for years:

Leach Stop® – Mineral Leaching Mitigation Treatment™ 
ElaSticone® – Silicone sealer for concrete, masonry and stone surfaces 
ElaSticone® GSX – Silicone with graffiti protection for concrete, masonry and stone surfaces 
Protect-A-Stone® – High-performance oil protection for stone surfaces 
ReJuviSeal® – Rejuvenating oil protection for stone surfaces

Coverage Rates

250 to 10,000 sq. ft. per gal. depending on the dilution rate


Product can be diluted to any concentration needed. 
  • Heavy Duty – This product may be used undiluted. 
  • Medium Duty – Dilute 35-65% with water. 
  • Light Duty – Dilute 10-35% with water.

Necessary Equipment 

  • Running water 
  • Chemical sprayer 
  • Deionized water tank (optional) 
  • Pressure washer (optional) 
  • Stone brush (optional)
Green-Kleen Product Info Chart
SolventWater Based
User FriendlyYes
Economically EfficientYes
Environmentally FriendlyYes

Surface Preparation 

Remove as much surface buildup as possible prior to using Green-Kleen. We recommend heated, deionized water to remove surface buildup, and to rinse the surface after product application.


This product can be used with a sprayer or any chemical injection applicator. Using a pump sprayer, apply Green-Kleen to the surface using a side to side wetting pattern starting at the bottom and working upward. Make sure to evenly and fully soak the surface. Allow the product to soak as long as possible without drying. Reapply the product if areas do become dry. Rinse using a pressure washer or water hose. If heavy soils are present and it appears necessary, use a strong, short bristled brush to agitate the surface. 

When product is applied to surfaces with biological growth, a bubbling reaction will occur on the surface. Apply product until this reaction subsides. This will signify that the biological growth has been removed.

If necessary, apply a second or third treatment to the stone, and repeat the process as previously described. When finished, make sure to rinse the surface multiple times to ensure no residue is left behind – especially when a water repellent is to be applied afterwards. 

This product will not harm the surface if used as directed and can be applied as many times as needed.   The product will work without the use of deionized water; however, it is recommended for superior performance.  

In many instances, a combination of different stone cleaning products is necessary for various stone surfaces depending on their level and type of staining. Presto offers a complete line of stone cleaning products for all situations, including:

  • Stone Restore® HD For difficult to remove mineral stains caused by efflorescence, rusting, red clay, iron, and more 
  • Stone Restore® NC For general cleaning of sensitive stone surfaces that require a neutral cleaner 
  • Stone Restore® A+ For heavy stains caused by oil, grease, grime and environmental pollution 
  • Stone Restore® CT A citrus multi-purpose stone cleaner that removes oil and a variety of stains 
  • Stone Restore® CB2 For difficult to remove biological stains 
  • Stone Restore® PS For stubborn surface contamination on all types of polished stone


We recommend the use of one of Presto's stone protective treatments to protect the newly restored surface for years: 
  • Leach Stop® – Mineral Leaching Mitigation Treatment™ 
  • ElaSticone® – Silicone sealer for concrete, masonry and stone surfaces 
  • ElaSticone® GSX – Silicone with graffiti protection for concrete, masonry and stone surfaces
  • Protect-A-Stone® – High-performance oil protection for stone surfaces 
  • Stone Guardian® – UV-resistant, breathable protection for superior water, oil and stain resistance 
  • ReJuviSeal® – Rejuvenating oil protection for stone surfaces 
  • Stone Enhancer® Series – Film-forming, acrylic-based protection for stone surfaces


The information provided by Presto for the safe and effective use of this product, and all of our products, is believed to be good and accurate. However, due to the many different possible applications of this product, careful considerations should be made when selecting its suitability for each surface.

The information provided should never be substituted for individual testing to ensure the product’s compatibility with each surface intended for use. The purchaser shall assume all responsibility for determining the suitability of this product. When used as intended, this product will perform as stated. No other warranty can be made for this product, verbally or written.

Presto warrants this product to be free from defects. In the event this product is found to be defective, we will provide a sufficient amount of product to replace the defective product.


View our Stone Restoration Pictures Featuring projects that utilized our many products for their buildings restoration, maintenance or cleaning project.

After cleaning or sealing stone surfaces the glass windows and metal frames almost always need to be cleaned, and many time window spots and stains removed as well. View our glass and metal products that compliment our stone restoration and protection arsenal.


Justin McGarty,
May 18, 2012, 3:41 PM
Justin McGarty,
May 11, 2012, 11:55 AM