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Use masonry cleaners such as:
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PROSOCO Inc.
Burnished Custom Masonry Cleaner (dilute 1:4)
Custom Masonry Block Cleaner (1:6)
Vanatrol (1:6)
- Diedrich Technologies Inc.
Diedrich 222 Cast Stone & Burnished Masonry Clenzer (1:4)
Specialty Masonry Cleaner (1:5)
Carefully follow manufacturer's instructions.
DO NOT apply cleaners with pressure spray
above 50 psi.
CAUTION! Never use muratic acid on units.
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