General
. Keep masonry units in progress as free from mortar smears as possible.
. Protect stored materials and the wall prior to completion to prevent excessive water entry and external soiling.

Application Information
. Masonry surfaces clean most effectively if the cleaning is done within 14-28 days after masonry 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 finished flooring, 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 placed 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.

Preparatory Work
. Always Test (minimum 4' by 4' area) before overall application to ensure suitability and desired results. Test each type of masonry and each type of stain. Allow test area to dry three to seven 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 for comparison throughout the cleaning project.
. Always pour cold water into empty bucket first, then carefully add 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 masonry cleaners with pressure spray above 50 psi. Such application will drive the chemicals deep into the surface making it difficult to rinse completely and may cause efflorescence.)
3) Allow cleaning solution to remain on wall for approximately five minutes, depending on absorption rate of masonry and drying conditions. Do not allow cleaner to dry into the masonry because it may leave a residue and cause staining.
4) Reapply cleaning solution and scrape off heavy buildup of excess mortar using a wooden scraper. Take care to avoid damaging the masonry surface. Do not use metal scrapers, which may contribute to metallic staining.
NOTE: Avoid more than one reapplication over the same area. Repeated applications may cause a white detergent film to be deposited on the masonry surface. If mortar deposits are not softened after initial application, allow the solution to remain on the wall for a longer period of time, making sure that the cleaner does not dry into the masonry.
5) Rinse thoroughly with fresh water, removing all cleaning compound, free sand, loose materials and debris. Thorough rinsing is extremely important to ensure that all residues are removed from the porous masonry.

NOTE: To avoid streaking, keep adjacent and lower wall surfaces wet and rinsed free of cleaning residues.

Test thoroughly and follow preparatory work procedures above.

Interior Application
Follow the cleaning procedure outlined for exterior surfaces. Rinse thoroughly with fresh water using a sponge or soft-fibered brush. If conditions do not allow sufficient water for complete rinsing, use a neutralizing rinse and the following procedure:
1) Rinse first with fresh, clean water.
2) Apply neutralizing rinse of two ounces household ammonia to one gallon of clean water.
3) Saturate thoroughly and allow neutralizing solution to dwell on the surface 3 to 5 minutes.
4) Apply a final rinse of fresh, clean water.

Detergent Cleaner
A suitable detergent solution can be made by dissolving 1/2 cup dry measure trisodium phosphate and 1/2 cup dry measure laundry detergent in one gallon of clean water. Trisodium phosphate can be obtained at most paint stores.

Optional Cleaners
SURE KLEANŽ Products such as SURE KLEAN 600 (15-20 parts water to one part concentrate cleaner) or SURE KLEANŽ Burnished Custom Masonry Cleaner following manufacturer's instructions.

Warning
Never use Muratic Acid Solutions on any masonry units. Trenwyth Industries, Inc. assumes no responsibility for the cleaning of units.

DO NOT POWER WASH. High pressure power washing is not recommended and may cause efflorescence.