Recommended Maintenance

Follow these simple guidelines to maintain your GenStone

Removing Dirt and Grime

Moderate Atmospheric Dirt: We recommend an occasional washing with clear water using a garden hose and soft-bristled brush (a long-handled, car-washing brush is ideal for this purpose).

Heavy Industrial Atmospheric Dirt: Wash in the manner indicated above, but use the following solution:

  • 1/3 cup detergent or 1/3 cup dish soap (Tide®, for example)
  • 2/3 cup trisodium phosphate (Soilmax or Dirtex, for example)
  • 1 gallon water

Mildew Accumulation: Mildew can collect on surfaces of all types of building products and is often evident on surfaces that have not been properly cared for and maintained. Normally, mildew will appear as black spots. Mildew is easy to remove by using the basic cleaning solution above with the addition of sodium hypochlorite as follows:

  • 1/3 cup detergent (Tide®, for example)
  • 2/3 cup trisodium phosphate (Soilax®, for example)
  • 1 gallon water

Caulking Compounds, Tar and Similar Substances: Use mineral spirits in reasonable amounts and apply directly to the foreign substance. Immediately after cleaning, rinse the area thoroughly with water.

Caution: Do not exceed the recommended concentrations of cleaners. To do so can cause damage to the Product. Avoid skin and eye contact with the solution, and in all cases follow manufacturer’s instructions for the use of cleaning compounds and solutions. Avoid use of abrasive-type cleaners and strong solvents. Test any cleaner on an inconspicuous area before applying to major areas. To minimize streaking, always follow with a rinsing of clear water. Excessive scrubbing is unnecessary and can be harmful to the Products, and may cause undesirable look in areas over the finish.

Anvil Aqua Seal or Similar Product

Like all other siding products, exposure to the elements may cause gradual, uniform change over time. At the first sign of any undesirable change in the appearance of your GenStone, we recommend applying Anvil Aqua Seal immediately and as required in the future. Applying the Aqua Seal will bring the panels back to their original look and color concentrations.

Paint Kits

Before applying the Aqua Seal, we recommend touching up areas where the paint may have come off the panels. Flaking paint is very uncommon and usually a result of the homeowner cleaning the GenStone with a high powered stream of water or harsh environmental factors.


Save the receipt(s) from the Aqua Seal you purchase so that our team can verify you have performed the recommended maintenance and upkeep precautions as outlined.

Other Similar Products

In the event Anvil Aqua Seal is unavailable, you must receive written approval from a GenStone customer service representative. Dealers and their employees do not qualify, to contact the GenStone team, please email [email protected]

Other Upkeep Suggestions

Anvil Aqua Seal or Similar Product: Typically covers 80-300 SQFT per gallon depending on surface porosity. For best results apply with a low-pressure garden sprayer or airless paint sprayer. Flood coat the surface liberally beginning at the top and allow Aqua Seal to run down the surface about 8 inches. For best sealing results, back roll the wet coat to uniformly force the sealer into the surface..

Landscaping: At GenStone we do recommend making sure your bushes, hedges and flowers are at least 6″ away from the stone paneling to avoid it being nicked by weed whackers and other landscaping hardware especially if you aren’t doing your own yard work.