Franklin Stone

Architectural Masonry / Franklin Stone

Franklin Stone Cleaning

Cleaning: Printable Version Word / Printable Version PDF

Walls must be cleaned/brushed off on a daily basis.

Masonry surfaces clean most effectively if the cleaning is done early. For smooth and Groundface finishes, the optimal time is 7-14 days after installation. For split or rough textured finishes, the optimal time is 7-21 days after installation. Mortar and grout smears that remain on the surface for a longer time result in a more difficult cleandown and may cause undesirable results.

Final cleandown of masonry surfaces should be completed before installation of windows, doors, hardware, light fixtures, roofing materials and any other non-masonry item that may be damaged by the cleaning product. If such fixtures have been installed, they must be protected before the cleaner is applied. All caulking and sealant materials should be in place and thoroughly cured before cleaning begins.

Protect all surrounding metal and non-masonry materials, painted surfaces and plant life from contact with the cleaner, residue or fumes.

Recommended PROSOCO Cleaners
Burnished Custom Masonry Cleaner (dilute 1:4)

Vanatrol (dilute 1:6)

CAUTION! Never use muriatic acid on units.

Test Cleaner

Prior to overall application, always test the cleaner (minimum 4″ x 4′ area) to ensure suitability and desired results. Test each type of masonry and each type of stain. Allow test area to dry for 3 - 7 days before inspection and approval by the project architect or building owner. Clean test areas according to the application below and always
make the test panel available throughout the cleaning project.

  • Always pour cold water into an empty bucket first before carefully adding detergent.
  • Never use hot water.
  • Handle in polyethylene or rubber buckets only.
  • Acidic materials and fumes will attack metal.

Exterior Application
The following cleaning procedure is recommended unless otherwise indicated during testing:

  1. Thoroughly saturate a large portion of the masonry surface with clean water.
  2. Using a densely-packed, soft-fibered masonry washing brush or low-pressure spray (50 psi maximum), apply diluted solution freely. (Do not apply cleaner with pressure spray above 50 psi. Such an application will drive the chemicals deep into the surfaces making it more difficult to rinse completely.)
  3. Depending on the absorption rate of masonry and drying conditions, allow cleaning solution to remain on the wall for approximately five (5) minutes. Do not allow cleaner to dry into the masonry because it may leave a residue and cause staining.


  • Keep walls clean by using brushes or rags.
  • Do not allow excess mortar lumps or smears to harden on the finished surfaces.
  • Protect stored materials and the wall prior to completion to prevent excessive water entry and external soiling.
  • Protect the exposed portions of metal fixtures. (Harsh cleaning methods after walls have been erected may mar the surface of the masonry units.)
  • Protect adjacent masonry and floor area by saturating with water and flushing away any cleaning solution before it dries.


  • Two plastic or hard rubber buckets
  • Rubber gloves
  • Soft fiber masonry brushes (or whitewash brushes)
  • Wooden, plastic or other soft, non-staining scraping device
  • Supply of clean wipes, such as lint-free cloths or paper towels
  • Clean water
  • Do not apply cleaner with pressure spray above 50 psi. It will cause efflorescence.

Cleaning Procedure 1

  1. Brush/spray clean water liberally on the surface area to be cleaned. Brush approximately one square yard at a time.
  2. It is important that the masonry wall be kept wet at all times. Do not use dirty water.
  3. Apply cleaning solution brushing in a circular motion to remove any unwanted mortar smears.
  4. Remove excess lumps of mortar with the soft (wood or plastic) scraping device and re-apply cleaning solution.
  5. Allow cleaning solution to remain on the surface for two or three minutes then wash off with liberal amounts of fresh, clean water.

Cleaning Procedure 2
If liberal amounts of water cannot be used, an alternative procedure may be employed.

  1. Soak a clean wiper in the cleaning solution. Wring it out so it is wet enough to dampen the surface, but dry enough so that the solution will not run down the wall.
  2. Allow the solution to remain on the surface for two or three minutes. Remove excess lumps of mortar with the soft scraping device and repeat Step #1.
  3. Wipe the wall completely dry with clean, dry wipers.

WARNING! Never use muriatic acid solutions on masonry units.

Final Cleandown
Clean the completed walls with a detergent masonry cleaner strictly following the manufacturer’s instructions including thorough rinsing. Do not use acid or abrasives on the masonry surfaces. For stubborn mortar stains or smears, reduce the dilution of the cleaning solution and test small area. Stronger dilutions may be used as long as the walls are thoroughly wetted with clean water before applying the cleaning solution and thoroughly rinsed with clean water immediately after washing.  400-1,000 psi with 40 degree tip is a safe effective pressure for rinsing the wall. Failure to strictly follow manufacturer’s instructions can result in permanent damage to the finished faces.