Surface Preparation

Comply with STC printed instructions and the following:
• Remove all spalled and unsound concrete from area to be repaired. If rusty reinforcing steel is present; it must be abrasive blasted to remove rust.
• Remove enough material to completely expose reinforcing steel.
• Large vertical or overhead patches deeper than 2” (50 mm) should contain reinforcing steel. Additional steel should be inserted using appropriate techniques, if none is present.
• Clean surface to be repaired of all materials including dust, oil, dirt and grease.
• Dampen with clean water before patching and remove standing water.