1-Gallon - GacoWash Concentrated Cleaner - (Puerto Rico including Vieques & Culebra)
1-Gallon - GacoWash Concentrated Cleaner - (Puerto Rico including Vieques & Culebra)

1-Gallon - GacoWash Concentrated Cleaner - (Puerto Rico including Vieques & Culebra)

Your Price: $119.95
Retail Price:$169.99
You Save:$50.04(29%)

Square Footage Calculator:

Your Measurements:

Total: 0 sq ft.
Total of Product units Required
In Stock.
Part Number:GCWASH1G-1 Puerto Rico



GacoWash Concentrated Cleaner

GacoWash Concentrated Cleaner is recommended for cleaning roof membranes and existing waterproof systems. GacoWash is the first step in the GacoRoof Silicone Roof coating application, removing dirt, mildew, fungus and pollen.

Coverage rate:Combine 1 part GacoWash Concentrated Cleaner with 9 parts water. Maximum coverage 400 square feet per diluted gallon, yielding up to 4000 square feet per gallon of concentrated GacoWash.

Note: Amount of cleaner required is job-specific; higher concentrations may be needed for adequate cleaning. 

Application process: No special equipment required, just roll it on. Power wash or scrub roof before applying. Can be applied when temperatures are between 32 - 120 degrees Fahrenheit.

Use On: Aged asphalt, aged EPDM and TPO / CPA, built up, cap sheet, composite, concrete, fiberglass, metal, modified bitumen, tar and gravel, torchdown, most existing coatings and coated polyurethane foam 
  • Concentrated - Mix one part with nine parts water
  • Cleans dirt, mildew, pollen and fungus
  • Use to clean before coating with GacoRoof


MIXING: For general cleaning, combine 1 part GacoWash Concentrated Cleaner with 9 parts water. Caution: Never mix GacoWash with other cleaning chemicals and always avoid contact with chlorine-based cleaners as the combination of these cleaners may produce a toxic gas release. 

SURFACE PREPARATION: It is extremely important to get the roof clean and dry. First remove heavy deposits of dirt, leaves and other debris from the roof using broom or air broomer then inspect the entire roof surface and flashings for any open seams, tears, cuts, etc. Repair these flaws so water is not blown in under membrane during the cleaning process. Pressure wash roof with water and allow it to dry completely. Biological Control: Areas of algae, mildew or fungus on the roof membrane or the existing coating should be treated with a solution of 1 part household bleach and 3 parts water, followed by a power washer rinse using clear water. 

APPLICATION: After the roof is completely dry from initial cleaning described above, apply GacoWash with a low pressure sprayer, using a 3-4 foot (0.91-1.22 m) arc pattern. A Hudson-type agricultural sprayer, conventional pressure sprayer or airless sprayer is recommended. Allow solution to stand for 10-15 minutes, adding a light mist of water to prevent drying. While it stands, lightly agitate any heavily soiled areas with a broom or brush. Do not allow dirt to settle in low areas. After application of cleaner, use a commercial power washer >3,000 psi (20.69 MPa) to remove debris and continue rinsing until all suds are gone. Start at the lowest point of the roof and work towards the highest point. For low-sloped roofs, work away from and then back towards roof drains. It is important to keep the surface wet until all of the GacoWash and other residue has been completely rinsed off and the surface is clean. After cleaning and rinsing the roof, ensure no dirt or debris is present. Allow surfaces to thoroughly dry to prevent blistering. 

DRY TIME: Drying time depends on weather conditions such as temperature, humidity and air movement. 

How to calculate how many gallons do you need:

  1.  Measure the roof area (length & width) that you desire to waterproof.
  2.  Add all the measurements to have  a total length and a total width  
  3.  Enter the measurements into the square footage calculating tool above and click on calculate
  4.  You are done!!  If you are ready to buy click on add to cart so you can go to the checkout section.   

Need a qualified roof contractor for your project?

CICFS, LLC has a network of qualified roof contractors for Home and Commercial projects in Puerto Rico.  Please click the following link to see the list of qualified contractors that can apply GacoRoof products on your roof

Please contact us at:
if you need assistance in finding the most qualified contractor to apply GacoRoof products on your roof.  Please specify what type of roof surface, total roof sqft area, and your complete contact information in your email.

Important Shipping Information:

For PR Mainland Orders (Does not Include Vieques & Culebra)

All Orders in Puerto Rico's Main Island will be shipped via a local courier service to your home or physical location with a Tracking number for your convenience free of charge. Vieques and Culebra orders will have a special delivery rate.  We will send you a shipment confirmation once the products have been shipped from our warehouse.